come with an inline-six cylinder engine was the Fairlady 200ZR which was only available in Japan. The 200ZR was the last Z-car to feature a factory-installed inline six, with roughly 8,283 produced between 1985 and 1988. They came in two trims; 200ZR-I (base model with the 'slicktop roof,' few amenities, and only in manual), and 200ZR-II (t-top roof, more electronic options, and available with an optional automatic transmission). 200ZR models also came standard with the R200 limited slip differential, white faced gauges, and ZR specific cloth upholstery. There were five engine options in total: A turbocharged dual overhead cam 2.0 L straight-six (RB20DET (NICS), used in the 200ZR), a turbocharged single overhead cam 2.0 L V6 (VG20ET, found in the Japanese domestic market 200Z/ZS/ZG), a naturally aspirated single overhead cam 3.0 L V6 (VG30E, found in 300ZX), a turbocharged single overhead cam 3.0 L V6 (VG30ET, used in 300ZX Turbo) and a naturally aspirated dual overhead cam 3.0 L V6 (VG30DE, used in 300ZR). The Z31 had electronic fuel injection (EFI), and was rear wheel drive. The VG30 engine was either a type A or type B sub-designation from 1984 to March 1987, while models from April 1987 to 1989 had a W sub-designation. The W-series engines featured redesigned water jackets for additional cooling, and fully floating piston wrist pins. Finally, these engines were equipped with self-adjusting hydraulic valve lifters. The transmissions were a 5-speed manual or an optional 4-speed automatic (all Z31 automatics were the E4N71B equipped with torque-converter lockup including turbo models). All Z31s were equipped with a Nissan R200 rear differential, April 1987 and later turbo models received an R200 clutch limited-slip differential except 1988 Shiro Specials which had a Viscous-type limited slip. As with some other Nissan models of the period, the new Z31s were equipped with a "Voice Warning System". The Voice Warning System used the vehicle's radio and driver's door speaker to mute the radio and provide a vocal warning whenever the left or right door was ajar, the exterior lights were left on after the vehicle was turned off, parking brake was left on while trying to operate the car, or the fuel level was low. This system was dropped for the 1987 model year. Other technological features in the 300ZX included a "Body Sonic" audio system that utilized a separate amplifier and speakers in the vehicle's front seats that allowed bass from