Toyota is developing a new 4.0-litre twin-turbo V8 for the GR GT road car and GR GT3 race car. For the GR GT, Toyota has published prototype development targets of at least 650 DIN hp (641 bhp) and 850 Nm of maximum system torque; those are hybrid system figures, not engine-only ratings or finalized production specifications.
Toyota announced the cars as under-development prototypes in December 2025 and is targeting a launch around 2027. Final specifications, pricing, and exact retail timing have not been confirmed in the cited official materials.
Toyota 4.0L twin-turbo V8 specs
The figures below are Toyota’s GR GT prototype development targets published by Toyota (GB) PLC in 2025. They should not be treated as finalized production specifications or applied to the GR GT3.
| Specification | GR GT development target |
|---|---|
| Engine | 4.0-litre twin-turbo V8 |
| Displacement | 3,998 cc |
| Bore x stroke | 87.5 x 83.1 mm |
| Maximum system output | At least 650 DIN hp (478 kW; 641 bhp) |
| Maximum system torque | At least 850 Nm |
| Transmission | 8-speed automatic |
| Drivetrain | Front engine, rear-wheel drive |
| Target top speed | At least 199 mph (320 km/h) |
| Target launch timing | Around 2027 |
Source: Toyota (GB) PLC, 2025 GR GT prototype development-target specification. The output and torque figures are system targets for the GR GT, not separate ratings for the V8 alone.
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Which models will use Toyota’s new V8?
Toyota has named two applications: the GR GT, a road-legal flagship sports car, and the GR GT3, a race car based on the GR GT and developed to FIA GT3 specifications. Toyota says the cars share the newly developed 4.0-litre twin-turbo V8, but the published GR GT target figures should not be assumed to describe the GR GT3.
| Model | Intended use | What Toyota has disclosed |
|---|---|---|
| GR GT | Road-going flagship sports car | V8 paired with one electric motor in a hybrid system; prototype development targets include at least 650 DIN hp and 850 Nm of system torque. |
| GR GT3 | GR GT-based FIA GT3-spec race car | Shares the 4.0-litre twin-turbo V8. The cited materials do not give a separate output target or establish that it uses the GR GT road car’s hybrid system. |
Toyota described the GR GT as “TGR’s new flagship sports car developed as a road-legal race car” in its December 5, 2025 premiere announcement.
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Is the GR GT V8 hybrid?
Yes. Toyota’s disclosed GR GT target specification pairs the twin-turbo V8 with a single electric motor integrated into the transaxle. The published minimum output and torque figures are for the hybrid system as a whole. The official materials cited here do not confirm hybrid equipment for the GR GT3.
What is known about the GR GT powertrain layout?
Toyota’s target specification describes the GR GT as front-engine and rear-wheel drive, with an 8-speed automatic and a transaxle-integrated motor. Toyota’s corporate coverage also names dry-sump lubrication, a carbon-fiber torque tube, and a transaxle layout. These disclosures describe the GR GT development program; Toyota has not published a full final production specification.
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- COLLECTIBLE VALUE: Part of the KiNSMART die-cast car collection, featuring precise detailing and realistic racing aesthetics
When will the Toyota GR GT launch?
Toyota says development is continuing toward a launch around 2027. That is a development target, not a confirmed on-sale date. The official source set does not establish final production specifications, pricing, or availability by market.
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How much horsepower does Toyota’s new V8 make?
Toyota’s GR GT prototype target is at least 650 DIN hp (641 bhp) for the hybrid system. Toyota has not published a separate engine-only horsepower rating in the cited materials.
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Which Toyota models will use the new 4.0-litre V8?
Toyota has identified the GR GT road car and the GR GT3 race car as applications. The GR GT3 shares the V8, but Toyota has not published a separate GR GT3 output target in the cited materials.
Is the GR GT3 hybrid?
The sources cited here specify a hybrid system for the GR GT road car, not the GR GT3. Do not assume the race car uses the road car’s hybrid system based on these disclosures.
When will the GR GT be available?
Toyota is targeting launch around 2027. It has not confirmed an exact retail date, final specifications, pricing, or market-by-market availability in the cited materials.
Quick Recap
Sources
- Toyota Motor Corporation, “TOYOTA GAZOO Racing World Premieres GR GT & GR GT3,” December 5, 2025
- Toyota (GB) PLC, “Toyota Gazoo Racing presents the world premiere of the GR GT and GR GT3,” December 5, 2025
- Toyota Motor Corporation, “Toyota GAZOO Racing and Lexus Hold World Premiere of GR GT, GR GT3, and Lexus LFA Concept,” December 5, 2025
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