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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsOn a broad definition of “available” that includes limited-production track-day cars, the strongest source-backed candidate for 2025 is the Ford GT Mk IV: Ford rates its 3.8-liter twin-turbo V6 at 820+ horsepower. The important qualification is that the GT Mk IV is a track-day car, not a road-legal production car, and Ford described a limited build wave rather than general inventory.
What is the highest-horsepower V6 available in 2025?
Ford Performance says the GT Mk IV’s Roush-Yates Engines-built 3.8-liter twin-turbo EcoBoost V6 produces 820+ horsepower. Ford described a final, limited wave of GT Mk IV cars as available to build to buyer requests. That makes it the strongest candidate supported by the sources cited here when track-day cars are included—not a confirmed worldwide ranking of every bespoke, race, or track-only V6.
Ford identifies the GT Mk IV as a track-day car. Its availability should therefore be understood as a limited build opportunity, not as evidence that the car was road legal or commonly available through ordinary dealer inventory. Ford’s GT Mk IV announcement states that “The 820+ horsepower being generated by the Roush-Yates Engines-built powerplant is also channeled through a more advanced clutch and paddle-shifted, six-speed gearbox than the Le Mans-winning drivers enjoyed.”
How the leading 2025 V6 figures compare
| Vehicle | V6 engine output | Combined system output | Availability and scope |
|---|---|---|---|
| Ford GT Mk IV | 820+ horsepower, according to Ford Performance in 2025 | Not applicable; the cited figure is the engine’s output | Limited build wave described by Ford; track-day car, not identified as road legal |
| Ferrari 296 Speciale | 700 cv, Ferrari’s stated maximum for the combustion V6 | 880 cv, Ferrari’s stated maximum for the plug-in hybrid powertrain | Announced by Ferrari in April 2025; road-car comparator, not proof of the absolute road-legal ranking |
| McLaren Artura | 690 hp, as listed on McLaren’s current model page accessed in 2026 | Not stated in the cited current model-page figure | Current model-page comparison; the page does not establish this as a 2025 model-year rating |
| Nissan GT-R | 565 horsepower, as listed on Nissan USA’s current legacy page accessed in 2026 | Not applicable to the cited engine-output figure | Historical context only: Nissan’s U.S. page says the model is no longer in production |
Why the Ferrari 296 Speciale’s 880 figure is different
The Ferrari 296 Speciale is a useful 2025 road-car comparison, but its headline maximum combines combustion and electric power. Ferrari’s April 29, 2025 announcement describes a combined output of 880 hp. Ferrari’s technical sheet specifies 700 cv for the 120-degree twin-turbo V6 and 880 cv for the plug-in hybrid system as a whole. The 880 cv figure is therefore not the V6’s engine-only output.
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Keep Ferrari’s published metric unit, cv, distinct from mechanical horsepower (hp). They are different units; a figure should not be relabeled as hp unless it is explicitly converted. Ferrari’s announcement uses “880 hp” for combined output, while its technical sheet gives 880 cv.
What “available in 2025” means for this comparison
Availability depends on what counts: offered to build, on sale, road legal, or track-only. Ford’s description supports a limited build opportunity for the GT Mk IV, not broad retail availability. The sources do not establish every relevant V6-powered car in every market or provide a complete list of bespoke and competition-only vehicles. Accordingly, the Ford is the strongest verified candidate in the evidence cited here, rather than a certified global maximum.
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- Including track-day cars: Ford’s GT Mk IV is the leading supported candidate at 820+ horsepower.
- Looking for a road-car comparison: Ferrari’s 296 Speciale provides a 2025 example, with 700 cv from its V6 and 880 cv combined from its plug-in hybrid powertrain. Those figures do not establish the highest road-legal V6 engine output worldwide.
- Using model-year or market rules: Specify the country, road-legality requirement, and whether a limited build offer qualifies. The available sources do not settle a narrower ranking across all markets.
Why the Nissan GT-R is not a 2025 new-production answer
Nissan USA’s current legacy page lists the GT-R at 565 horsepower, but it labels the model “No Longer In Production.” Nissan announced the final R35 vehicle in August 2025. The GT-R is useful historical context, not a newly available 2025 production-car alternative.
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