The R90C was developed jointly with the Lola Cars International company, but the R91C was 100% manufactured by Nissan. The "CP" refers to JSPC specifications, while "CK" means WSPC specifications; a difference can be seen in the shape of the rear spoiler. The yellow No.27 car is an R90CK from the UK (NME)*. Following Nissan's decision to pull out of world championship racing, this machine (Nakatani, Volker Weidler) took part in the JSPC as the "From-A R91CK Nissan".
*NME: Nissan Motorsports Europe