| Manufacturer | Nissan Motors |
|---|---|
| Production | 1968-1973 |
| Predecessor | Prince GR-8 |
| Configuration | I6 |
| Displacement | 2.0 L (120 cu in) |
| Cylinder bore | 82 mm (3.2 in) |
| Piston stroke | 62.8 mm (2.47 in) |
| Valvetrain | DOHC |
| Fuel system | Three Weber 40DCOE carbs Lucas mechanical fuel injection (after 1969) |
| Power output | 120 kW (160 hp) |
| Torque output | 180 N·m (130 ft·lb) |
| Dry weight | 199 kg (440 lb) |
The Nissan S20 engine (1998 cc) was a straight-6, DOHC internal combustion engine produced by Nissan (designed by the former Prince engineers) in the 1970s. It was essentially the same as the 1966 Prince GR8 engine of Prince/Nissan's R380 racecar. It produces 160 hp (120 kW) @7000 rpm and 180 N·m (130 ft·lbf). The S20 weights 199 kg (439 lb).
The S20 powered Nissan's Skyline GT-R (C10 and C110) and Fairlady Z432 models
The S20 was one of the technical carryovers to the Nissan brand from Prince technology. The Skyline model - built as a Prince car since the model's inception in the 1950s - received the new engine. The Skyline GT-B in 1969 saw the introduction of the PGC10 GT-R, followed by the KPGC10 GT-R with a shorter wheelbase and 2 fewer doors in 1970. This model would later win a 50 straight touring car victories. For 1972, Nissan introduced the C110 Skyline powered by the L series of engines. A small number of KPGC110 GT-R would be built utilizing the remainder of the S20s.
The S20 was later fitted to the Nissan Fairlady Z432, a sports racing model of the Nissan Fairlady Z (S30) model line.
The S20 features a dual overhead cam, cross-flow head with four valves per cylinder, and hemispherical combustion chambers. Early versions were fed via triple Weber 40DCOE carbs; models after 1969 featured Lucas mechanical fuel injection. In racing trim, the fuel-injected motors reportedly produced over 225 bhp (168 kW), with 250 bhp (190 kW) for larger tracks like Fuji Speedway.
This engine was used in the following vehicles:
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