The Z31 chassis designation was first introduced in 1983 as a 1984 Nissan/Datsun 300ZX (the hatch lid had both a Datsun badge and a Nissan badge) in the US only. The 300ZX, as its predecessors, was known as a Nissan in other parts of the world. This continued in the US until 1985 model year when Nissan standardized their brand name worldwide and dropped the Datsun badge. A note can be made that all publications for the Z31 chassis 300ZX and its predecessors were copyright Nissan North America. Designed by Kazumasu Takagi and his team of developers, the 300ZX improved aerodynamics and increased power when compared to its predecessor, the 280ZX. The newer Z-car had a drag coefficient of 0.30 and was powered by Japan's first mass-produced V6 engine instead of an I6. According to Nissan, "the V6 engine was supposed to re-create the spirit of the original Fairlady Z.
This new V6 (2960 cc) Single overhead cam engine was available as a naturally-aspirated VG30E or a turbocharged VG30ET producing 160 hp (119 kW) and 200 hp (150 kW) respectively. The engine was either a type A or type B sub-designation from 1984 to April 1987, while models from May 1987 to 1989 had a W sub-designation. The W-series engines featured redesigned water jackets for additional cooling, fully floating piston wrist pins, and more power—165 hp naturally-aspirated and 205 hp (153 kW) turbocharged. The 1984 to 1987 turbo models featured a Garrett T3 turbocharger with a 7.8:1 compression ratio, whereas 1988 to 1989 models featured a low inertia T25 turbocharger with an increased 8.3:1 compression ratio. Finally, these engines were equipped with self-adjusting hydraulic valve lifters. The transmissions were a 5-speed manual or an optional 4-speed automatic (E4N71B for turbo models, L4N71B for naturally-aspirated models). The automatic transmission on the turbo models did not have a lockup mechanism. All Z31's were equipped with a Nissan R200 rear differential, later year turbo models received an R200 limited-slip differential. There were three trim models available: SF, GL and GLL. The SF model was only available in Canada.
Similar to Chrysler's Electronic Voice Alert, the 1984-1986 Z31 GL and GLL models featured a voice warning system.
Technical data:- engine: V6
- capacity: 2960 cc
- horsepower: 160 HP
- gearbox: 5+1
- top speed: 220 km/h
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