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| Nissan R90CK | |
|---|---|
| Name | Nissan R90CK |
| Manufacturer | Nissan |
| Production | 1990 |
| Class | Group C |
| Body style | Sports prototype |
| Layout | Longitudinal rear mid-engine, rear-wheel-drive |
| Engine | Nissan VRH35Z 3.5 L V8 twin-turbo |
| Transmission | 5-speed manual |
| Predecessor | Nissan R89C |
| Successor | Nissan R391 |
Nissan R90CK The Nissan R90CK is a Group C sports-prototype racing car built by Nissan and campaigned by works and privateer teams in 1990, notable for its advanced aerodynamics and a powerful twin-turbo V8. Developed to compete in the World Sportscar Championship and 24 Hours of Le Mans, the R90CK combined components from Nissan Motorsports International programs and drew on engineering links with Tom Walkinshaw Racing and aerodynamic work reminiscent of Sandler}}, Yamamoto, and contemporary prototypes by Jaguar Sport, Peugeot Talbot Sport, and Mazda Motorsports.
Nissan commissioned design work after the R89C program to answer competition from Mercedes-AMG, Porsche AG, Toyota Gazoo Racing, and Mazda Motorsport in the Group C category. Styling and chassis choices reflected consultation with specialist firms and drew on lessons from the World Sportscar Championship. The R90CK used a carbon-fibre monocoque and sophisticated ground-effect aerodynamics influenced by advances seen in Sauber-Mercedes, Jaguar XJR, and Porsche 962 developments. Suspension geometry and brake system choices echoed practices employed by TWR and teams run by figures such as Tom Walkinshaw and John Barnard while integrating input from Nissan engineers who had collaborated with NISMO and Motul partners.
The R90CK was powered by the VRH35Z, a 3.5-litre twin-turbocharged V8 developed by Nissan engineers that shared technological lineage with engines used in endurance and prototype racing programs. The powertrain featured a five-speed manual transmission and a rear-wheel-drive layout in a long-tail and short-tail bodywork configuration optimized for low drag on circuits like Circuit de la Sarthe and high downforce on tracks such as Suzuka Circuit and Silverstone Circuit. Chassis construction employed a carbon-fibre monocoque with aluminium honeycomb bulkheads, while suspension used double wishbones and pushrod-actuated dampers, components comparable to those used by Porsche AG and Sauber. Electronics and engine management reflected collaborations with suppliers common to teams like Toyota Team TOM'S and Peugeot Talbot Sport in the era.
The R90CK made its competitive debut in 1990 with entries in rounds of the World Sportscar Championship and the 24 Hours of Le Mans, fielded by factory-backed squads and privateers including teams with ties to Nissan Motorsports International and independent entrants that raced cars alongside competitors from Porsche AG, Mazda Motor Corporation, and Toyota Motor Corporation. Drivers who piloted the R90CK included names active in international sports car racing, competing on circuits such as Monza Circuit, Spa-Francorchamps, Autodromo Nazionale Monza, and Circuit de Monaco support events. The campaign intersected with contemporaneous regulations changes influenced by FIA policy discussions and the shifting priorities that would later affect Group C.
On fast circuits and long straights like those at Circuit de la Sarthe, the R90CK demonstrated strong top-speed performance owing to its twin-turbo V8 and aerodynamic long-tail variants, enabling competitive showings against Mazda 787B, Porsche 962C, and Sauber-Mercedes C11 entries. Qualifying pace and race reliability varied; the car scored notable speed accolades but struggled with endurance reliability relative to more developed factory efforts from Toyota Gazoo Racing and Peugeot Talbot Sport. Results at marquee events produced mixed finishes and highlighted the technical gap that opened with the arrival of evolving prototype designs from Mercedes-Benz and Jaguar Racing programs.
Though its competitive record was limited by the era’s rapid technical evolution and regulatory shifts led by the FIA and World Sportscar Championship stakeholders, the R90CK influenced Nissan’s subsequent prototype programs and informed design choices for later projects such as the Nissan R391 and road-and-race engine work linked to NISMO. Surviving examples are preserved by collectors and historic racing teams, appearing at events like Goodwood Festival of Speed and Le Mans Classic, where they are displayed alongside machines from Porsche, Jaguar, Mazda, and Sauber. The R90CK remains a touchstone in Nissan’s motorsport heritage, connected to wider histories involving TWR, Tom Walkinshaw, and endurance racing milestones at Le Mans and the World Sportscar Championship.
Category:Group C cars