Fastest is a dangerous word in automotive history, because it changes meaning depending on when you’re standing on the timeline. A 150-mph car in 1965 rewrote the laws of physics as understood by Detroit, while a 150-mph car today barely qualifies as a warm-up act. To crown a true speed king for each decade, we have to judge cars the way their own era judged them, using the tools, roads, and expectations that actually existed.
What “Fast” Meant in Its Own Time
In the 1950s and early 1960s, outright top speed ruled supreme because highways were expanding faster than racetracks. Manufacturers chased aerodynamic efficiency and cubic inches, knowing that sustained high-speed cruising sold cars as much as dragstrip bragging rights. By the late 1960s and into the muscle car era, quarter-mile acceleration and 0–60 mph times became the currency of speed, reflecting stoplight wars and NHRA credibility.
As the decades progressed, speed fragmented into specialized metrics. The 1980s and 1990s saw handling, braking, and real-world drivability begin to matter as emissions regulations and fuel economy reshaped power delivery. By the 2000s and beyond, fastest increasingly meant a combination of top speed, acceleration, and lap times, with modern supercars expected to dominate in every measurable category.
Period-Correct Testing and Why Numbers Differ
Testing methods matter as much as the cars themselves. Early magazine tests often relied on hand-timed runs, optimistic speedometers, and factory-provided cars that were sometimes “blueprinted” within a generous interpretation of stock. Tire technology, track surfaces, and even fuel quality varied wildly, making direct comparison to modern instrumented testing meaningless without context.
By the 1970s and 1980s, standardized quarter-mile timing equipment and more rigorous road tests brought consistency, but power ratings themselves became suspect due to the shift from gross to net horsepower. A car that appeared weaker on paper could be just as fast in the real world, especially when gearing, torque curves, and weight were factored in. Modern GPS-based data acquisition is brutally honest, but it benefits from technology earlier cars never had access to.
Technology, Regulation, and the Shape of Speed
Every fastest car is a product of its constraints. Emissions controls, safety regulations, fuel crises, and corporate politics often limited how speed could be achieved, forcing engineers to innovate rather than simply add displacement. Turbocharging, lightweight materials, electronic engine management, and advanced aerodynamics didn’t just make cars faster, they changed how speed was delivered and sustained.
Competition also played a decisive role. When rival manufacturers pushed boundaries, speed escalated rapidly; when regulations tightened or market priorities shifted, progress slowed or took new forms. Understanding the fastest American car of any decade means understanding the battlefield it fought on, because raw numbers alone never tell the whole story.
The Birth of American Speed (1950s): Horsepower Wars, Early V8s, and the First 150‑MPH Contenders
As the postwar boom took hold, American automakers discovered that speed sold just as effectively as chrome. With minimal regulation and cheap fuel, engineers chased displacement and compression rather than efficiency. The 1950s didn’t just ignite America’s love affair with horsepower; they defined the blueprint for straight-line performance that would dominate for decades.
This was an era before wind tunnels, traction control, or radial tires. Speed was achieved the hard way, through cubic inches, aggressive cam profiles, and gearing tall enough to turn highways into proving grounds. The fastest American cars of the decade weren’t refined sports cars; they were barely civilized muscle machines wearing tailored suits.
The Horsepower Wars Begin
Early in the decade, most American cars struggled to break 110 mph, limited as much by chassis stability as engine output. That changed rapidly once overhead-valve V8s became widespread, led by Cadillac’s 331, Chrysler’s FirePower Hemi, and Chevrolet’s small-block V8 in 1955. Horsepower jumped from the 200 range to well beyond 300 HP in just a few model years.
Compression ratios climbed, multi-carb setups proliferated, and factory-backed racing programs fed development directly into production cars. Automakers were no longer shy about advertising speed, and by the mid-1950s, top-speed supremacy became a measurable bragging right rather than a vague claim.
The Fastest American Car of the 1950s: 1957 Chrysler 300C
By period-correct metrics, the clearest speed champion of the 1950s was the 1957 Chrysler 300C. Powered by a 392 cubic-inch Hemi V8 producing up to 375 HP with dual four-barrels, the 300C was brutally quick for its time and astonishingly fast at the top end. Contemporary road tests recorded top speeds in the 140–145 mph range, with factory-supported runs at Bonneville suggesting the car could crest 150 mph under ideal conditions.
What made the 300C remarkable wasn’t just raw output, but its ability to sustain speed. With a relatively aerodynamic body for the era, a stiffened suspension, and optional heavy-duty components borrowed from Chrysler’s racing efforts, it was engineered to run flat-out longer than most competitors dared. In an age when brakes faded quickly and bias-ply tires protested violently, that mattered.
Why the 300C Stood Apart
The Hemi’s hemispherical combustion chambers allowed for better airflow and higher RPM stability, giving the Chrysler a broader and more usable powerband than many rivals. Paired with tall gearing, the car traded some off-the-line punch for relentless high-speed acceleration. It was less a drag-strip brawler and more a high-speed missile, a philosophy that aligned perfectly with top-speed dominance.
Equally important was intent. Chrysler openly targeted NASCAR, endurance events, and speed records, while many competitors were still hedging between luxury and performance. That competitive pressure shaped the 300 “letter cars” into something uniquely focused for the era, blurring the line between race car and executive express.
Context Matters: Speed Without Safety Nets
Calling any 1950s car a 150‑mph contender requires context. Speedometers were optimistic, testing environments inconsistent, and sustained high-speed runs were rare due to tire and brake limitations. Yet within those constraints, the 300C stood at the very edge of what American engineering could reliably deliver at the time.
The 1950s didn’t produce a true supercar by modern standards, but they established the arms race. By proving that factory-built American cars could flirt with 150 mph, this decade set the psychological benchmark that every performance era since has chased, refined, and redefined.
Muscle Takes Over (1960s): Big-Block Brutality and the Rise of Straight-Line Dominance
If the 1950s proved America could build cars that flirted with extreme speed, the 1960s answered a different question: how fast could you get there, and how violently? This was the decade when straight-line acceleration became the cultural obsession, driven by cheap displacement, rising horsepower wars, and a drag-strip mentality that reshaped Detroit’s priorities.
Aerodynamics and endurance briefly took a back seat to cubic inches and torque curves. Quarter-mile times, not sustained top speed, became the headline metric, and manufacturers learned quickly that brute force sold cars faster than nuanced engineering explanations.
The Shift: From High-Speed Cruisers to Muscle-First Engineering
By the early 1960s, the formula was brutally simple. Drop the largest possible V8 into the lightest intermediate body, reinforce just enough of the chassis to survive warranty claims, and let physics handle the rest. Solid rear axles, leaf springs, and bias-ply tires were crude, but they worked shockingly well in a straight line.
Engines ballooned past 400 cubic inches, compression ratios soared, and factory horsepower ratings became optimistic at best. While European performance cars chased balance and road-holding, American manufacturers chased torque, knowing that massive low-end thrust could overwhelm nearly any rival before aerodynamics even mattered.
Fastest of the Decade: 1969 Dodge Charger Daytona
Despite the muscle era’s drag-strip fixation, the fastest American car of the 1960s circled back to top speed dominance. That title belongs to the 1969 Dodge Charger Daytona, specifically in 426 Hemi form. In street trim, contemporary testing and gearing calculations suggest a top speed in the 150–155 mph range, already staggering for a full-size American coupe.
In racing configuration, the Daytona rewrote the rulebook. On NASCAR superspeedways, it became the first car to officially exceed 200 mph, with Buddy Baker’s 200.447 mph run at Talladega in 1970 cementing the design’s capability. No other American production-based car of the decade came remotely close to that ceiling.
Why the Daytona Was Untouchable
Unlike most muscle cars, the Daytona didn’t rely solely on horsepower. Its 18-inch nose cone and towering rear wing weren’t styling gimmicks; they dramatically reduced lift and drag at high speed, solving the stability problems that plagued slab-sided muscle cars above 140 mph. This allowed the car to actually use its power rather than fight the air.
The 426 Hemi’s strengths complemented that aero advantage perfectly. With massive airflow capacity, forged internals, and race-bred durability, it produced real-world output well north of its rated 425 HP. Paired with tall gearing, the Daytona transformed raw power into sustained velocity, something few 1960s cars could manage safely.
Straight-Line Glory, With Sharp Edges
For all its speed, the Daytona still reflected the era’s compromises. Brakes were marginal by modern standards, high-speed tire technology lagged far behind engine output, and real-world stability depended heavily on driver nerve. This wasn’t a car designed for twisty roads or repeated high-speed stops.
Yet that tension defines the 1960s muscle era. Speed arrived faster than control, and engineering solutions often followed public demand rather than leading it. The Charger Daytona stands as the decade’s ultimate expression of that mindset: an unapologetic missile built to dominate straight-line speed, and a clear signal that American performance had entered its most aggressive phase yet.
Peak Muscle and Abrupt Collapse (1970s): Emissions, Insurance, and the Last True Speed Kings
If the late 1960s were about discovering how fast American cars could go, the early 1970s were about squeezing in one final, unfiltered answer before the door slammed shut. The technology peaked, the engines were at their largest and most aggressive, and manufacturers briefly ignored the storm clouds forming around emissions law, insurance liability, and fuel economy.
The result was a short, violent apex followed by one of the fastest performance collapses in automotive history.
The Fastest American Car of the 1970s: 1970 Plymouth Superbird (426 Hemi)
At the top of the decade, nothing on American roads could outrun the 1970 Plymouth Superbird equipped with the 426 Hemi. Mechanically and aerodynamically, it was the Charger Daytona’s direct evolution, refined just enough to be even more effective at extreme speed.
In street form, period testing and modern simulations consistently place the Hemi Superbird in the 155–160 mph range with correct gearing. That made it the fastest American production-based car of the decade, and one of the fastest road cars in the world at the time, regardless of country of origin.
Why the Superbird Was the Final Peak
Like the Daytona, the Superbird didn’t rely on brute force alone. Its extended nose cone reduced frontal pressure, while the rear wing managed airflow separation and rear-end stability at speeds where most muscle cars became terrifyingly light.
The 426 Hemi provided the other half of the equation. With massive valve area, hemispherical combustion chambers, and a bottom end designed for sustained abuse, it produced far more than its advertised 425 HP. Crucially, it could hold that power at high RPM long enough to turn tall rear gearing into real top-end speed rather than brief acceleration bursts.
Insurance, Emissions, and the Death of Honest Horsepower
Almost immediately after the Superbird’s debut, the environment that allowed it to exist collapsed. Insurance companies began penalizing high-displacement, high-power cars with massive premiums, effectively pricing young buyers out of the market. Sales of Hemi-equipped cars cratered overnight.
At the same time, emissions regulations forced manufacturers to slash compression ratios and detune engines for cleaner combustion. The shift from gross to net horsepower ratings exposed just how much performance was being lost. A car rated at 425 HP in 1970 might struggle to break 250 net HP just a few years later.
The Fuel Crisis and the End of the Speed Race
The 1973 oil crisis delivered the final blow. Fuel economy went from an afterthought to a national priority, and outright speed became politically and economically toxic. High-performance models weren’t just detuned; many were canceled entirely.
By the mid-1970s, American performance cars struggled to exceed 120–130 mph, a staggering regression from what the Superbird had already achieved years earlier. The decade that began with the fastest American road cars ever built ended with heavier, slower machines focused on survival rather than dominance.
A Brief, Violent Zenith
The Superbird and its contemporaries represent the absolute high-water mark of classic American muscle. They were engineered without restraint, built before compromise became mandatory, and driven in an era when top speed still mattered more than emissions charts or actuarial tables.
Nothing that followed in the 1970s would come close. American performance wouldn’t truly recover for decades, and when it did, it would rely on entirely different tools to chase speed again.
Surviving the Malaise (1980s): Turbocharging, Aerodynamics, and Technology’s Quiet Comeback
The 1980s didn’t announce a performance renaissance with big cubic inches or outrageous styling. Instead, American speed clawed its way back quietly, hiding behind wind tunnels, electronic fuel injection, and forced induction. After a decade of retreat, engineers were finally learning how to make cars fast again without triggering regulators, insurers, or fuel shortages.
This was not a return to brute force. It was a pivot toward efficiency, stability at speed, and smarter power delivery, all of which mattered just as much as raw horsepower once top-end performance re-entered the conversation.
Technology Replaces Displacement
With compression ratios still constrained and emissions equipment mandatory, large naturally aspirated engines could no longer carry the load. Turbocharging became the workaround, allowing smaller engines to make serious power only when demanded. Electronic engine management made that power usable and repeatable, something carburetors never handled well under boost.
At the same time, chassis tuning improved dramatically. Radial tires, stiffer unibody structures, and better dampers meant cars could actually remain stable beyond 140 mph, a speed that had been functionally unreachable for most American vehicles just a few years earlier.
The Corvette’s Redemption Arc
The fourth-generation Chevrolet Corvette, introduced in 1984, marked the most important structural shift in American performance during the decade. Its aluminum-intensive chassis, low drag coefficient, and vastly improved suspension geometry were designed with sustained high-speed capability in mind, not just quarter-mile theatrics.
By the late 1980s, a standard C4 Corvette was capable of roughly 155–160 mph, already faster than nearly anything from the 1970s. More importantly, it could do it with stability, braking confidence, and durability that earlier muscle cars simply didn’t possess.
The Fastest American Car of the 1980s: Callaway Twin Turbo Corvette
The undisputed American speed king of the decade arrived not from a factory skunkworks, but from Callaway Cars. The Callaway Twin Turbo Corvette, offered through Chevrolet dealers starting in 1987 under the RPO B2K code, transformed the C4 into a genuine world-class high-speed machine.
Its twin-turbocharged 5.7-liter V8 produced between 345 and 382 HP depending on specification, but the real story was aerodynamics and gearing. In independent testing, the Callaway Corvette reached a verified top speed of 178 mph, a figure that finally surpassed the legendary Superbird and re-established American credibility at the top end.
Why This Speed Mattered
Unlike the muscle cars of the early 1970s, the Callaway Corvette didn’t rely on excess. It used boost to overcome emissions limits, wind-tunnel refinement to reduce drag, and modern cooling to sustain speed without overheating or detonation. This was performance engineered for endurance, not just headlines.
Equally important, it proved American manufacturers could compete again on a global scale. At a time when European exotics dominated top-speed charts, an emissions-compliant, dealer-sold American car was running with the fastest machines in the world, quietly signaling that the long recovery was finally working.
Modern Muscle Reawakens (1990s): EFI, Chassis Advances, and America Reclaims Top-Speed Credibility
The foundation laid in the late 1980s finally paid dividends in the 1990s. Electronic fuel injection matured, emissions compliance stopped strangling output, and chassis engineering caught up to horsepower in a meaningful way. American performance was no longer about brute force alone; it was about control, cooling, and sustained speed.
Just as importantly, manufacturers were designing cars to survive high-speed operation. Wind tunnels replaced guesswork, brakes grew to match velocity, and suspension geometry was engineered for stability at triple-digit speeds, not just straight-line blasts.
The 1990s Performance Landscape: Power Meets Discipline
By the early 1990s, multi-port EFI allowed precise fuel delivery across the rev range, eliminating the compromises of carburetors under emissions rules. Higher compression ratios, aggressive cam profiles, and better knock control meant real horsepower could return without sacrificing reliability.
Chassis design evolved just as rapidly. Wider tracks, lower centers of gravity, and stiffer structures transformed how American cars behaved above 150 mph, a threshold that had once been terrifying rather than routine.
The Viper Effect: America Goes All-In on Speed
No car symbolized this reawakening more clearly than the Dodge Viper. Introduced in 1992 as the RT/10 roadster and refined into the GTS coupe by 1996, the Viper rejected electronic crutches in favor of mechanical purity and overwhelming displacement.
Its 8.0-liter, later 8.3-liter, V10 produced 400 to 450 HP depending on year, paired to a six-speed manual and a brutally direct drivetrain. With long gearing and immense torque, the Viper wasn’t just fast off the line; it was built to run.
The Fastest American Car of the 1990s: Dodge Viper GTS
The Dodge Viper GTS earns the decade’s top-speed crown. Independent testing consistently recorded top speeds between 185 and 190 mph, placing it firmly among the fastest production cars in the world during the late 1990s.
Unlike earlier American speed kings, the Viper achieved this without forced induction or exotic materials. It relied on displacement, aerodynamics honed for stability, and a chassis capable of handling sustained high-speed loads without drama or degradation.
Why the Viper’s Speed Was a Turning Point
The Viper proved that American manufacturers could build a car that intimidated European exotics on their own terms. It wasn’t lighter or more complex, but it was brutally effective, mechanically honest, and engineered to endure speed rather than briefly survive it.
This mattered because it restored confidence. After decades of regulation-induced retreat, the 1990s showed that American performance wasn’t just back, it was credible, competitive, and once again feared at the top end.
Horsepower Arms Race (2000s): Supercharging, Hypercar Performance, and Nürburgring Ambitions
If the 1990s restored American confidence, the 2000s turned that confidence into open warfare. Power numbers exploded, forced induction became mainstream, and the conversation shifted from quarter-mile bravado to global benchmarks like top speed records and Nürburgring lap times.
This was the decade when American engineers stopped asking whether they could compete with Europe and started asking how far they could push physics before tires, aerodynamics, or cooling cried uncle.
Forced Induction Goes Factory-Approved
Supercharging defined the early 2000s performance surge. The 2003–2004 SVT Cobra, known as the “Terminator,” delivered 390 HP and 390 lb-ft from a factory-supercharged 4.6-liter V8, and it did so with daily-driver reliability.
GM escalated the arms race with the 2009 Corvette ZR1. Its 6.2-liter LS9 V8 used an Eaton supercharger to produce 638 HP, pushing the C6 chassis past 200 mph while remaining emissions-compliant and warranty-backed.
From Straight-Line Speed to Global Credibility
This era wasn’t just about raw output; it was about proving American cars could dominate on the world’s most demanding stages. The Nürburgring Nordschleife became the ultimate validation tool, blending speed, endurance, and chassis balance into a single brutal metric.
The Dodge Viper ACR reset expectations in 2008 with a 7:22 lap, achieved through massive mechanical grip, adjustable aero, and obsessive weight reduction. The Corvette ZR1 followed with a 7:26 lap, showing that forced induction and refinement could coexist with track credibility.
The Fastest American Car of the 2000s: SSC Ultimate Aero
While Detroit refined world-class performance cars, a small Washington-state manufacturer went straight for the jugular. The SSC Ultimate Aero, introduced in 2007, was powered by a twin-turbocharged 6.3-liter V8 producing up to 1,183 HP in record-setting trim.
In 2007, the Ultimate Aero achieved a verified two-run average of 256.18 mph, earning the Guinness World Record for the fastest production car in the world. That figure didn’t just eclipse American rivals; it dethroned Europe’s best on pure, indisputable speed.
Why the Ultimate Aero Redefined the Ceiling
The SSC’s achievement mattered because it shattered the idea that hypercar performance required European heritage or Formula 1-derived technology. It relied on extreme power density, ruthless aerodynamic efficiency, and gearing designed solely for maximum velocity.
By the end of the 2000s, American performance had split into two dominant paths: factory-backed supercars chasing balance and lap times, and boutique hypercars chasing absolute speed. Both proved the same point—the horsepower arms race was no longer domestic, and America was no longer chasing.
The Golden Age of Excess (2010s): 700+ HP Factory Cars, Aero Science, and Record-Breaking Speed
If the 2000s proved America could build world-class performance cars, the 2010s were about excess without apology. Factory horsepower crossed the 700 HP threshold as a baseline, not a headline, while aerodynamics evolved from styling cues into full-blown applied science.
This was the decade where supercharged V8s, dual-clutch transmissions, and active aero became showroom-normal. Emissions regulations tightened, yet output skyrocketed, forcing engineers to extract speed through efficiency, cooling, and downforce rather than displacement alone.
Factory Brutality Goes Mainstream
Cars like the Dodge Challenger SRT Hellcat redefined expectations in 2015 with 707 HP from a supercharged 6.2-liter HEMI. It wasn’t a limited-production halo car; it was a mass-produced coupe with air conditioning, a warranty, and the ability to run 200 mph with the right gearing.
Chevrolet escalated the arms race with the 2019 Corvette ZR1, producing 755 HP from the LT5 V8. Its massive rear wing, front splitter, and advanced cooling package showed how deeply aero engineering had penetrated American performance philosophy.
Aerodynamics Becomes a Weapon
The 2010s marked the point where straight-line speed alone was no longer enough. Active aerodynamic elements, computational fluid dynamics, and wind-tunnel validation became mandatory for stability beyond 200 mph.
Downforce was no longer a byproduct; it was tuned with the same precision as suspension geometry. This allowed American cars to remain controllable at speeds that would have been terrifying, or outright impossible, just a decade earlier.
The Fastest American Car of the 2010s: Hennessey Venom GT
At the absolute edge of the decade’s speed obsession sat the Hennessey Venom GT. Based loosely on a heavily reengineered Lotus Exige chassis, it was powered by a twin-turbocharged 7.0-liter LS-based V8 producing up to 1,244 HP.
In 2014, the Venom GT recorded a one-direction top speed of 270.49 mph at NASA’s Shuttle Landing Facility in Florida. While it didn’t qualify for an official two-run Guinness record due to technicalities, it was undeniably the fastest any American car had ever traveled.
Why the Venom GT Defined the 2010s
The Venom GT embodied the decade’s defining traits: extreme power density, obsessive weight reduction, and aerodynamics tuned specifically for maximum velocity. At roughly 2,700 pounds, it relied on a ruthless power-to-weight ratio rather than brute-force mass.
It also highlighted a key reality of the era. Factory performance had become astonishing, but absolute top speed still belonged to small manufacturers willing to ignore production volume, creature comforts, and global regulations in pursuit of one number.
By the end of the 2010s, American performance had reached a surreal plateau. 700 HP was normal, 200 mph was achievable, and the boundary between factory supercars and boutique hypercars had never been thinner.
The Digital Speed Era (2020s): Electrification, Hybrid Power, and the New Definition of American Fast
As the 2020s opened, American performance entered a radically different phase. Raw displacement and boost were no longer the sole answers; software, battery chemistry, hybridization, and simulation-driven engineering now dictated what “fast” actually meant.
Speed became multidimensional. Acceleration, sustained high-speed stability, thermal management, and repeatability mattered as much as top-end bragging rights, especially under tightening emissions and safety regulations.
Speed Goes Digital
Electric motors fundamentally rewrote acceleration physics. Instant torque delivery, millisecond-level traction control, and torque vectoring made sub-two-second 0–60 mph runs achievable without race fuel, slicks, or stripped interiors.
Cars like the Tesla Model S Plaid redefined real-world speed, delivering supercar-level acceleration with full street legality and four doors. While its top speed is electronically limited compared to hypercars, its ability to annihilate quarter-mile times exposed how software and electrons could outperform mechanical complexity.
Hybrid Performance and the American Hypercar Revival
At the same time, American manufacturers began blending internal combustion with electrification rather than abandoning it. Hybrid systems were used not for economy, but for filling torque gaps, stabilizing power delivery, and improving corner exit speeds.
This philosophy showed up in machines like the Chevrolet Corvette E-Ray and extreme low-volume projects such as the Czinger 21C. While these cars focused more on lap times than vmax, they illustrated how American performance was no longer bound to a single power source.
The Fastest American Car of the 2020s: SSC Tuatara
When the discussion turns strictly to top speed, one car still stands above the rest. The SSC Tuatara, powered by a twin-turbocharged 5.9-liter flat-plane-crank V8 producing up to 1,750 HP on E85, remains the fastest American car of the decade.
In January 2021, the Tuatara recorded a two-run average top speed of 282.9 mph on a closed highway in Nevada, earning official recognition after earlier controversy. This achievement made it the fastest production car ever verified at the time, American or otherwise.
Why the Tuatara Defines the 2020s
Unlike earlier speed kings, the Tuatara is as much a digital product as a mechanical one. Its aerodynamics were shaped using advanced CFD and aerospace-level airflow modeling, resulting in an exceptionally low drag coefficient for a 1,000-plus-horsepower car.
Active stability systems, traction algorithms, and real-time data logging were critical to keeping the car controllable at nearly 300 mph. This was not brute force; it was computational speed applied to physical motion.
The New Meaning of American Fast
By the mid-2020s, American speed had split into two dominant paths. Electric vehicles ruled acceleration and usability, while hyper-focused combustion and hybrid machines chased absolute velocity at the fringe of what roads and tires could survive.
What united them was intelligence. Code, sensors, and simulation now matter as much as cam profiles and compressor maps, marking the most profound philosophical shift in American performance history.
Final Verdict: From Muscle to Microprocessors
Across the decades, the fastest American cars evolved from big-cube bruisers into aerodynamic weapons, and now into digitally optimized systems on wheels. Each era reflected its technological limits and cultural priorities, but the pursuit of speed never wavered.
In the 2020s, American dominance isn’t just measured in horsepower or miles per hour. It’s measured in how effectively engineering, software, and innovation converge to push the boundaries of what a roadgoing vehicle can achieve.
