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A naturally aspirated Corvette V8 draws air into its cylinders using atmospheric pressure; a supercharged V8 uses an engine-driven compressor to force in a denser intake charge. More air allows more fuel to be burned and can produce substantially more power. In the C7 generation, the naturally aspirated LT1 and supercharged LT4 and LT5 show that contrast in Chevrolet’s 6.2-liter engine family. Newer Corvettes add an important distinction: the C8 ZR1’s LT7 is twin-turbocharged, not supercharged.
What is the difference between a supercharged Corvette V8 and a naturally aspirated one?
The difference is how the engine gets air. A naturally aspirated (NA) V8 relies on atmospheric pressure and the engine’s intake stroke to fill its cylinders. A supercharged V8 has a compressor mechanically driven by the engine that compresses the intake air before it reaches the cylinders. Because compressed air is denser, the engine can burn more fuel in each cycle and make more power.
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That extra airflow comes with added hardware and engineering demands. The compressor takes power to operate, and the engine needs systems and calibration suited to the added pressure and heat. The Corvette specifications below show factory ratings and hardware, but they are not controlled tests of otherwise identical cars. They cannot, by themselves, establish that one aspiration type has better fuel economy, reliability, response, or maintenance costs.
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Chevrolet’s 2024 performance catalog identifies the naturally aspirated LT1 in C7 Stingray and Grand Sport applications, the supercharged LT4 in the C7 Z06, and the supercharged LT5 in the 2019 ZR1. All three are 6.2-liter V8s, but their listed output and forced-induction hardware differ.
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| Engine and Corvette application | Aspiration and displacement | Power rating | Torque rating | Compression ratio | Charge-air hardware |
|---|---|---|---|---|---|
| LT1 — C7 Stingray and Grand Sport, catalog configuration | Naturally aspirated, 6.2 L | 460 hp at 6,000 rpm | 465 lb-ft at 4,600 rpm | 11.5:1 | No supercharger listed [Chevrolet Performance 2024 catalog] |
| LT4 — C7 Z06 | Supercharged, 6.2 L | 650 hp at 6,400 rpm | 650 lb-ft at 3,600 rpm | 10.0:1 | 1.7 L supercharger; 9.4 psi boost in the catalog [Chevrolet Performance 2024 catalog] |
| LT5 — 2019 C7 ZR1 | Supercharged, 6.2 L | 755 hp at 6,400 rpm | 715 lb-ft at 3,600 rpm | 10.0:1 | 2.65 L supercharger; 14 psi boost; charge-cooling system described by Chevrolet as having about twice the LT4 system’s capacity [Chevrolet Performance 2024 catalog] |
The shared displacement makes the catalog comparison useful, but it does not isolate the effect of a supercharger: the engines appear in different applications and are not otherwise identical cars in a controlled test. The ratings are manufacturer specifications for the configurations named, not predictions of every car’s performance.
LT4: the C7 Z06’s supercharged 6.2-liter
Chevrolet’s catalog lists a 1.7-liter supercharger and 9.4 psi of boost for the LT4. GM Powered Solutions separately describes the engine as using an Eaton R1740 TVS 1.7-liter supercharger, producing more than 9 pounds of boost, and specifies 650 hp, 650 lb-ft, 10.0:1 compression, and premium 93-octane gasoline for its certified specification. Actual output can vary with the application’s calibration. [GM Powered Solutions LT4 specifications]
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- 547 ft-lb. Maximum Torque
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LT5: the 2019 ZR1’s higher-output package
For the 2019 ZR1, Chevrolet lists a larger 2.65-liter supercharger, 14 psi of boost, and higher rated output than the LT4. The catalog also describes the LT5 charge-cooling system as having about twice the LT4 system’s capacity. These details describe the factory packages; the figures do not establish how either engine behaves in every driving condition.
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Engine codes need their Corvette generation and application attached: the letters and numbers alone do not tell you whether an engine is naturally aspirated, supercharged, or turbocharged. The 2025 Corvette owner’s manual lists naturally aspirated LT2 and LT6 engines alongside the LT7, which is the ZR1’s twin-turbo engine—not a supercharged V8.
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| Engine and 2025 Corvette application | Aspiration | Displacement | Manufacturer-listed output |
|---|---|---|---|
| LT2 — Stingray and E-Ray | Naturally aspirated | 6.2 L | 490 hp and 465 lb-ft with standard exhaust; 495 hp and 470 lb-ft with performance exhaust [2025 Corvette owner’s manual, technical data] |
| LT6 — Z06 | Naturally aspirated | 5.5 L | 670 hp and 460 lb-ft [2025 Corvette owner’s manual, technical data] |
| LT7 — ZR1 | Twin-turbocharged | 5.5 L | 1,064 hp and 828 lb-ft [2025 Corvette owner’s manual, technical data] |
The LT6 is a notable modern NA example despite its high output. In a June 2026 Chevrolet Newsroom interview about the 2027 Corvette engine lineup, Chevrolet performance engineer Dustin Gardner described its character as “the free-breathing, naturally aspirated, high engine speed, light, flat plane crank, supercar character.” [Chevrolet Newsroom, June 5, 2026]
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why “boosted” does not necessarily mean supercharged
Both superchargers and turbochargers compress intake air, so both are forms of forced induction and are often described as “boosted.” Their drive sources differ: a supercharger is mechanically driven by the engine, while a turbocharger is driven by exhaust gas. The C7 LT4 and LT5 are supercharged examples; the C8 ZR1 LT7 is twin-turbocharged. Calling all three “supercharged” would misidentify the LT7’s hardware.
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What the ratings can—and cannot—tell you
- They show factory-rated output for named applications. The LT1, LT4, and LT5 figures in Chevrolet’s 2024 catalog, and the LT2, LT6, and LT7 figures in the 2025 owner’s manual, are not one same-car comparison.
- Exhaust equipment can change a listed rating. For the 2025 LT2, the owner’s manual gives separate output figures for standard and performance exhaust.
- They do not settle real-world trade-offs. The cited manufacturer specifications do not provide controlled comparisons of fuel economy, throttle response, heat management, repair cost, or reliability between these Corvette engine types.
- Application matters. Calibration can affect actual output; GM Powered Solutions explicitly notes this for its LT4 specification.
