The first GT-R Skyline appeared in 1969, called the PGC-10 (KPGC-10 for later coupé version) internally and Hakosuka (ハコスカ) by fans. It used the 2.0 L (1998 cc) S20 I6. This new DOHC engine (which was designed by the former Prince engineers) produced 160 hp (119 kW) and 180 N⋅m (133 lb⋅ft) of torque, and was similar to the GR8 engine used in the Prince R380 racing car.
The GT-R began as a sedan, but a 2-door coupé version was debuted in October 1970 and introduced in March 1971. The cars were stripped of unnecessary equipment to be as light as possible for racing, and performed well at the track. The sedan racked up 33 victories in less than two years, and the coupé stretched this to 50 through 1972.