GT Prototype

2026 GR

S1771

The 2026 GR GT Prototype is a rare S1-class car in Forza Horizon 6, rated at 771 PI. Power comes from a twin turbocharged 4.0L V8 producing 700 hp and 645 lb·ft of torque. Drive is sent to the rear wheels through a 8-speed gearbox.

Speed 7.9

Handling 6.4

Accel 6.8

Braking 7.4

Launch 7.4

Offroad 5.0

Specifications

Class: S1 · 771 PI
Rarity: Rare
Layout: Front RWD
Engine: Twin-Turbo · V8 · 4.0L
Power: 700hp
Torque: 645ft·lb
Weight: 3,803lb
Front Weight: 45%
Gears: 8-spd
Top Speed: 219mph
Origin: Japan
Calipers: #D20014
Year: 2026
Credits: 250,000

Collections

Super GT

S1 class · High performance production class. Supercars and exotics. Car class designates a car's performance level by taking into account grip, weight, and power.

Forzavista

About the GR GT Prototype

At 3,803 lb it carries about 5.4 lb per horsepower, with a 45% front weight balance, and tops out near 219 mph in stock form. It hails from Japan, it plays as a rear-wheel drive car. High performance production class. Supercars and exotics. Car class designates a car's performance level by taking into account grip, weight, and power.

More GR cars · Browse S1-class cars · Build & tune this car

Dyno V8

Stock power & torque across the rev range — curve shape from the game's engine model, scaled to this car's peak figures.

Power 700 hp @ 7,234 Torque 645 lb·ft @ 3,098 Redline 7,200

Full specifications

Every value the game stores for this car, straight from the data files.

Identity11

Year: 2025
Make: GR
Model: GT Prototype
Model (short): GR GT Prototype
Media name: TOY_Scallop_26
Class: S1
Performance index: 771
PI (raw): 0.673
Car type: Production
Country: Japan
Region: Asia

Classification & availability15

Rarity score (0-10): 0
Family - special: 2 Doors
Convertible: None
Unicorn: No
Arcade: No
Open cockpit: No
Open wheel: No
Base cost: 250,000 CR
Content ID: 99
Model ID: 4221
Hidden from Autoshow: No
Hidden from Auction House: No

View all 15

Has livery: Yes
Has race livery: Yes
Has car experience: No

Engine & drivetrain12

Engine config: 'V' Engine
Cylinders: 8
Aspiration: Twin Turbocharged
Displacement: 3,998 cc
Powertrain ID: 1
Engine placement: Front-engine
Drive type: RWD
Gears: 8
Peak power (sim): 5219.53
Peak torque (sim): 8.75
Redline (sim, rad/s): 754
Peak power RPM (sim, rad/s): 743.51

Performance - manufacturer spec3

0-60 mph: 3.2 s
0-100 mph: 6.7 s
Top speed: 219 mph

Performance - in-game sim9

0-60 mph (sim): 3.583 s
0-100 mph (sim): 7.033 s
Quarter mile (sim): 11.283 s
Quarter mile trap speed (sim): 134.398 mph
Top speed (sim): 215.44 mph
Braking 60-0 (sim): 82.287 ft
Braking 100-0 (sim): 200.673 ft
Lateral g at 60 mph (sim): 1.184 g
Lateral g at 120 mph (sim): 1.288 g

Catalog ratings (0-10)8

Speed: 7.94
Handling: 6.44
Acceleration: 6.81
Braking: 7.42
Launch: 7.43
Offroad: 4.96
Min offroad perf: 0.62
Max upgrade wizard perf: 0.78

Weight, balance & traction7

Curb weight: 1,725 kg
Weight distribution (front %): 45 %
Front ride height: 0.12 m
Rear ride height: 0.125 m
Road traction: 0.614
Offroad traction: 0.445
Snow traction: 0.379

Tires & wheels9

Stock tire compound: Sport
Tire brand: APR Performance
Front tire: 265/35 R20
Rear tire: 325/30 R20
Stock wheel: GT Prototype
Caliper color (front): #D20014
Caliper color (rear): #D20014
Caliper angle (front): 0 deg
Caliper angle (rear): 0 deg

Aero11

Downforce front: 66.03
Downforce rear: 134.91
Longitudinal drag: 149.89
Vertical drag: 500
Lateral drag front: 225
Lateral drag rear: 275
Front downforce clamp: 167.055 kg
Rear downforce clamp: 289.85 kg
Downforce scale: 1
Drag scale: 1.04
Wing mask: 1

Physics (advanced)55

CarClassModifier: 0
Body material: Aluminum
SpeedLimiterID: 0
AutoSteerOverrideID: 2
FixListingRearFricScale: 1.35
FixListingNormSlip0: 0.5
FixListingNormSlip1: 1
FixListingSteerAngle0: 0.5
FixListingSteerAngle1: 1
BodyAeroAngleZeroDownforce: 45
BodyAeroWIForceScale: 0.51
TireAeroHackShouldApply: No

View all 55

TireAeroHackMinSpringLoad: 5
TireAeroHackMaxSpringLoad: 5
AIPlayerID: 0
SimPeakTorqueAngVel: 261.8
GameTorqueScale: 0.93
GameDownforceScaleOffroad: 1
IsPurchased: Yes
IsInstalled: Yes
GaugeID: -1
IsCarExperienceUnlocked: No
IsDrivable: Yes
LatFrontScalarMax: 0
LatFrontScalarClamp: 0
LatRearScalarMax: 0
LatRearScalarClamp: 0
LongAccelFrontScalarMax: 0
LongAccelFrontScalarClamp: 0
LongAccelRearScalarMax: 0
LongAccelRearScalarClamp: 0
LongBrakeFrontScalarMax: 0
LongBrakeFrontScalarClamp: 0
LongBrakeRearScalarMax: 0
LongBrakeRearScalarClamp: 0
IsCameraCollidable: No
UseBoxCameraCollision: No
PuddleScale: 0.908
AssistsTCSSlipDefTakeoff: 33
AssistsTCSSlipDefMoving: 0.3
AssistsTCSControlSpeed: Yes
AssistsTCSFullEffectFricDiff: 0.6
AssistsTCSFullSteerSlipScaleRWD: 1.55
AssistsTCSFullSteerSlipScaleFWD: 1
AssistsTCSFullSteerSlipScaleAWD: 1.6
DoNotAllowRemovalFromGarage: No
VisibleOnlyIfOwned: No
UseTireRigidBodies: No
UseMultiRaycastTireCollision: Yes
SprungForcesApplyToFullCarMass: Yes
Brake profile: Super GT
RaceMode: No
UseForcePropLongTorque: No
TurnOffHeadlightsInAutoShow: No
ShowDriverInExteriorCamera: Yes

FAQ

Quick answers about the 2026 GR GT Prototype in Forza Horizon 6.

What engine does the 2026 GR GT Prototype have?

A twin turbocharged 4.0L V8 engine.

How much power does the GR GT Prototype make?

700 hp and 645 lb·ft of torque in stock form.

What class and Performance Index is the GT Prototype in Forza Horizon 6?

It runs in the S1 class with a Performance Index (PI) of 771.

Is the GT Prototype RWD, FWD, or AWD?

rear-wheel drive (Front RWD layout).

What is the top speed of the GT Prototype?

Around 219 mph in stock form, before tuning.

How much does the GT Prototype cost in Forza Horizon 6?

250,000 CR at the Autoshow.

Specifications

About the GR GT Prototype

Dyno V8

Full specifications

FAQ

More from GR All GR →

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