quoted directly from wikipedia because I couldn’t have written it better:
“The Porsche 959 was Nissan’s target when designing the GT-R. The chief engineer, Naganori Itoh, intended to use the car for Group A racing, so the design specification was drawn up in conjunction with a copy of the Group A rules. The Nordscheilfeproduction car record at the time of development was 8’45″ – set by a Porsche 944. Nissan test driver Hiroyoshi Katoh reset the record with a time of 8’20″. Best Motoring managed 8’22″38.
The R32 GT-R dominated Japanese Touring Car Championship (JTCC), winning 29 races from 29 starts, taking the series title every year from 1989-1993. It took 50 races from 50 starts from 1991-1997 (latterly R33) in the N1 Super Taikyu.
The R32 GT-R was introduced in to the Australian Touring Car Championship in 1990 and promptly ended the reign of the previously all-conquering Ford Sierra Cosworth, winning Bathurst 1000 classic in 1991 & 1992. This success led to the Australian motoring press nicknaming the car Godzilla due to it being a “monster from Japan”. As Australia was the first export market for the car the name quickly spread. Such was GT-R’s dominance that it is seen by some as a significant factor in the demise of Group A Touring Car racing, the formula being scrapped soon after. JTCC was similarly blighted by the R32 GT-R, and splintered soon after, leading to the switch to the Supertouring category and also indirectly to the GT500 category of today.”