The IMSA RXR One Super Gran Turismo 4.0 V8 (860 Hp) is a high-performance coupe produced by IMSA starting in 2017. Representing the pinnacle of the RXR One model line, this variant was designed to deliver extreme performance and exclusivity within the burgeoning market for ultra-high-end grand tourers. It distinguishes itself through its potent twin-turbocharged V8 engine and focus on a driver-centric experience. The RXR One aimed to compete with established marques like Ferrari and Lamborghini, offering a unique blend of Italian design and German engineering.
Technical Specifications
| Brand | IMSA |
| Model | RXR One |
| Generation | RXR One Super Gran Turismo |
| Type (Engine) | 4.0 V8 (860 Hp) |
| Start of production | 2017 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (urban) | 12.3 l/100 km (19.1 US mpg, 23 UK mpg, 8.1 km/l) |
| Fuel consumption (extra urban) | 7.8 l/100 km (30.2 US mpg, 36.2 UK mpg, 12.8 km/l) |
| Fuel consumption (combined) | 9.5 l/100 km (24.8 US mpg, 29.7 UK mpg, 10.5 km/l) |
| CO2 emissions | 220 g/km |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 1.5 kg/Hp, 663.6 Hp/tonne |
| Weight-to-torque ratio | 1.3 kg/Nm, 771.6 Nm/tonne |
| Power | 860 Hp |
| Power per litre | 216 Hp/l |
| Torque | 1000 Nm (737.56 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 178 |
| Engine displacement | 3982 cm3 (243 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Kerb Weight | 1296 kg (2857.19 lbs.) |
| Drivetrain Architecture | Rear wheel drive, Internal Combustion engine |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 305/30 ZR20; 315/30 ZR21 |
| Wheel rims size | 12.0J x 20; 12.5J x 21 |
Powertrain & Engine Architecture
The heart of the RXR One Super Gran Turismo is the M 178 4.0-liter twin-turbocharged V8 engine. This engine, derived from a collaboration with German engineering expertise, utilizes direct fuel injection and intercooling to maximize power output and efficiency. The twin-turbocharger setup delivers a broad torque curve, minimizing turbo lag and providing responsive acceleration. The engine produces a staggering 860 horsepower and 1000 Nm (737.56 lb.-ft.) of torque. Power is delivered to the rear wheels via a sophisticated automatic transmission, optimized for quick shifts and seamless power delivery. While specific transmission details are limited, it is understood to be a multi-speed unit designed to handle the engine’s immense output. The engine oil capacity is 7.5 liters, requiring a high-specification lubricant to ensure optimal performance and longevity.
Driving Characteristics
The RXR One Super Gran Turismo delivers a visceral driving experience. The combination of the powerful V8 engine and rear-wheel drive configuration results in exhilarating acceleration and dynamic handling. The weight-to-power ratio of 1.5 kg/Hp contributes to the car’s responsiveness, allowing for rapid changes in speed. The automatic transmission, while providing convenience, is tuned for performance, offering quick and precise gear changes. Compared to potential theoretical versions with manual transmissions, the automatic prioritizes ease of use and accessibility for a wider range of drivers. The car’s relatively low curb weight of 1296 kg (2857.19 lbs.) further enhances its agility and responsiveness.
Equipment & Trim Levels
The IMSA RXR One Super Gran Turismo was positioned as a premium offering, and as such, came standard with a comprehensive array of luxury and performance features. The interior is appointed with high-quality materials, including leather upholstery and carbon fiber trim. Standard equipment included a premium audio system, climate control, and power-adjustable seats. While customization options were extensive, allowing buyers to personalize their vehicles to their exact specifications, core features focused on enhancing the driving experience and providing a luxurious cabin environment. Options included bespoke interior color schemes, upgraded audio systems, and advanced driver-assistance features.
Chassis & Braking
The RXR One features a double wishbone suspension system at both the front and rear, designed to provide optimal handling and ride comfort. Ventilated disc brakes are employed on all four wheels, ensuring powerful and consistent stopping performance. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during hard braking maneuvers. The car rides on high-performance tires, sized 305/30 ZR20 at the front and 315/30 ZR21 at the rear, mounted on large-diameter alloy wheels (12.0J x 20 front, 12.5J x 21 rear). These components work in concert to deliver a balanced and engaging driving experience.
Market Reception & Comparison
The IMSA RXR One Super Gran Turismo was met with generally positive reviews, with critics praising its performance, styling, and exclusivity. However, its limited production run and high price point restricted its market reach. Fuel economy figures of 9.5 l/100 km (24.8 US mpg) combined are respectable for a vehicle of this performance caliber, but are not its primary selling point. Compared to competitors like the Ferrari 812 Superfast or Lamborghini Aventador, the RXR One offered a unique alternative, blending Italian design with German engineering. Its CO2 emissions of 220 g/km place it within the range of other high-performance supercars.
Legacy
The IMSA RXR One Super Gran Turismo 4.0 V8 (860 Hp) remains a relatively rare and sought-after vehicle in the used car market. The M 178 engine, while complex, has proven to be generally reliable when properly maintained. The car’s exclusivity and performance potential continue to attract collectors and enthusiasts. While long-term maintenance costs can be significant due to the specialized components and limited parts availability, the RXR One represents a unique and compelling offering in the world of high-performance grand tourers. Its blend of power, luxury, and exclusivity ensures its place as a notable vehicle in the early 21st-century automotive landscape.
