The Nissan R90C was a platform used for Group C racing cars built in 1990 by Nissan Motors for competition in World Sportscar Championship (WSC) based in Europe and the All Japan Sports Prototype Championship (JSPC). The cars based on the basic R90C platform would compete until 1993 before Nissan chose to withdraw from sports car racing, not returning until 1997. It won three JSPC championships and several significant endurance races during its career. Development Mechanically, the R90Cs shared much with their predecessor, the R89C. Most of the chassis construction was the same, as well as the mechanical layout. The Nissan VRH35Z 3.5 litre twin-turbo V8 that debuted in the R89C was successful and kept as part of the R90C's design. Although mechanically similar, the cars were nearly all new constructions. Chassis builder Lola Cars International termed the cars T90/10, succeeding the T89/10. Unlike the R89C, Nissan felt the car was a compromise. This led Nissan to develop two different cars. Although Lola built the basic chassis, Nissan Motorsports Europe constructed the R90CK in its shops evolving the R89C design. At the same time, the R90CP was built at Nismo's headquarters in Japan in a lower downforce, high speed layout. This gave the two cars a noticeably different design. R90CK The R90CK was an evolution of the R89C's design, borrowing many stylistic elements. The front end of the car was low, with two deep channels on either side of a slanted nose leading to radiator inlets on the sides of the cockpit. Small slated inlets were placed on the leading edge of the car, partially feeding brake cooling ducts. The cockpit featured a longer raked windshield than the R89C, yet the areas around the cockpit remained nearly identical, including the sides of the car. At the rear, the rear wing was mounted high on exposed struts for better downforce. The design and development of NPTI's R90CK was conducted in association with Ray Mallock Limited and the cars were prepared and run out of RML's workshop in 1990, before being shipped to the United States to take part in the 1991 24 Hours of Daytona. R90CP The R90CP ("P" referring to the Oppama Nissan plant where Nismo is based) had a low downforce design. The front of the car featured a higher nose, with the narrow channels eliminated and replaced with large ducts on the inside of the fender. The fenders