Nissan R90C

The Nissan R90C was either of two Group C racing cars built in 1990 for 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 as well as several significant endurance races during its career.

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 had debuted in the R89C was proven successful and kept as part of the R90C's design. Although mechanically similar, the cars were nearly all new constructions, leading to chassis builder Lola Cars International terming the cars T90/10, while the R89Cs had been T89/10.

Unlike the R89C, Nissan felt that the car was a compromise. At the time, Nissan competed with the R89Cs in both the World Sportscar Championship and All Japan Sports Prototype Championships.

This led Nissan to actually develop two different cars. Although Lola built the basic chassis, Nissan Motorsports Europe would construct the rest of the R90CK in their shops evolving the R89C design. At the same time, R90CP would be built at Nismo's headquarters in Japan in a lower downforce, high speed layout. This gave each of the two cars a unique design that is noticeably different.

The R90CK would appear as an evolution of the R89C's design, borrowing many stylistic elements which had been used before. 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 would also be placed on the leading edge of the car, partially feeding brake cooling ducts. The cockpit would feature a longer raked windshield then the R89C, yet the areas around the cockpit would remain nearly identical, including the sides of the car. At the rear, the rear wing would be mounted high on exposed struts for better downforce.

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Wikipedia