 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.