Toyota has officially detailed the GR GT and GR GT3, two high-performance machines developed under the direction of Akio Toyoda and the company’s elite test-driver team. Both models bring major improvements in aerodynamics, rigidity, weight balance, and powertrain technology.

They share a newly developed 4.0-liter twin-turbo V8, while the GR GT adds an advanced rear-mounted hybrid system. 🏎️⚡

According to Toyota, both cars were shaped using lessons from motorsport and tested extensively at Fuji Speedway, Nürburgring, and on public roads. Market launch is planned for around 2027, though specifications may still evolve.

---

🏗️ Architecture & Structural Innovation

Different Missions, Shared DNA

• GR GT: Designed as a street-legal homologation model.
• GR GT3: Engineered strictly for FIA GT3 competition.

Core Engineering Principles

Toyota focused on three pillars:

Engineering Pillar	Description
🧱 Low Center of Gravity	Packaging optimized for stability and grip.
⚖️ Low Weight + High Rigidity	Aluminum structure + CFRP components.
🌬️ Aerodynamic Efficiency	Development started with aero targets before styling.

Lightweight Construction

• GR GT: Toyota’s first fully aluminum structure, combined with CFRP exterior panels.
• GR GT3: Shares the same aluminum chassis and GT-derived suspension components.

Weight Distribution

Model	Weight Distribution
GR GT	45:55 (Front/Rear)

This balance is achieved through careful placement of the battery, fuel tank, engine, and rear transaxle.

---

🔩 Powertrain: Twin-Turbo V8 Muscle

GR GT: Hybrid-Enhanced Performance ⚡

• Engine: 3,998 cc twin-turbo V8
• Features: dry-sump lubrication, hot-V layout, CFRP torque tube
• Integrated motor-generator placed ahead of the transaxle
• Combined power target: 650+ hp
• Torque target: 850+ Nm

Transmission:

• 8-speed automatic, wet-start clutch
• Allows manual shifting in automatic mode
• Tuned for sharp, direct response

GR GT3: Pure Racing Specification 🏁

• Uses the same V8, but no hybrid system
• Built to comply with FIA GT3 regulations
• Strict rear-wheel-drive race configuration

---

🛞 Suspension, Tires & Braking

Component	GR GT	GR GT3
Suspension	Double wishbone front & rear	Same
Arms	Forged aluminum	Forged aluminum
Tires	Michelin Pilot Sport Cup 2 (custom)	Race-spec tires
Brakes	Carbon-ceramic	Motorsport setup

🌧️ Stability system: Multiple adjustable intervention levels based on driver skill and conditions.
🏆 Borrowed tech from endurance racing, including the 24 Hours of Nürburgring.

---

🌪️ Aerodynamics & Functional Design

Toyota reversed the usual design process:

1. Define aerodynamic goals
2. Shape the exterior around them

Design Personality

• GR GT (road model): More traditional street proportions
• GR GT3 (race model): Surfaces tailored to meet competition rules

Interior

• GR GT: Low seating, wide visibility, ergonomic layout for high-speed road use
• GR GT3: Stripped and focused for racing performance only

---

📏 Dimensions & Key Specs

GR GT

Specification	Value
Length	4,820 mm
Width	2,000 mm
Height	1,195 mm
Wheelbase	2,725 mm
Weight	Up to 1,750 kg
Seats	2
Top Speed	320+ km/h

GR GT3

Specification	Value
Length	4,785 mm
Width	2,050 mm
Height	1,090 mm
Notes	Final specs may change

---

🧪 Testing & Future Outlook

Both models have gone through countless development loops, featuring:

• Repeated simulation + rebuild cycles
• Input from Lexus LFA engineers
• Processes inspired by the Japanese Shikinen Sengu philosophy (periodic renewal)

🚀 Toyota expects both cars to enter their final development phase soon, with production planned around 2027.