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RB20DE (2.0L I6 NA/T)
The first RB20ET/DE/DET engines were fitted to the HR31 Skyline and the Nissan Fairlady 200ZR (Z31 chassis), produced from August 1985. The early twin cam engines featured the NICS (Nissan Induction Control System) injection system, while the later twin cam engines used ECCS (Electronic Concentrated Control System). Later versions which used ECCS engine management, discarded the twelve tiny runners for six much larger ones (though they retained twelve ports on the head, so there was a splitter plate). It was also fitted to the A31 Cefiro, C32 and C33 Laurel. The Fairlady 200ZR was fitted with an intercooled NICS type RB20DET.

The first RB20E engine was used in the C32 Nissan Laurel, produced from October 1984.

Laurels, R32 Skyline and Cefiros used the second (1989–1993) series RB20E/DE/DET. This had an improved head design, and used the ECCS injection system. These later motors are known as "Silver Top" engines.

The RB20DET-R was used in the Nissan Skyline 2000GTS-R (HR31) and was limited to 800 units.

There were a variety of 2.0 L RB20 engines produced:


 * RB20E
 * single-cam
 * Power: 96 to 110 kW at 5600 rpm
 * Torque: 167 to 181 Nm at 4400 rpm
 * Camshaft duration: 232° intake; 240° exhaust
 * Camshaft lift: 7.3 mm intake, 7.8 mm exhaust
 * RB20ET
 * single-cam, turbocharged
 * Power: 125 kW at 6000 rpm
 * Torque: 206 Nm at 3200 rpm
 * RB20DE
 * twin-cam
 * Power: 110 to 114 kW at 6400 rpm
 * Torque: 181 to 186 Nm at 5600 rpm
 * Camshaft duration: 232° intake, 240° exhaust
 * Camshaft lift: 7.3 mm intake, 7.8 mm exhaust
 * RB20DET
 * twin-cam, turbocharged
 * Power: 158 kW at 6400 rpm
 * Torque: 264 Nm at 3200 rpm
 * Camshaft duration: 240° intake, 240° exhaust; 248° intake, 240° exhaust ("Red Top")
 * Camshaft lift: 7.3 mm intake, 7.8 mm exhaust; 7.8 mm intake, 7.8 mm exhaust ("Red Top")
 * RB20P
 * single-cam, 12 valves, autogas LPG
 * Power: 94 PS at 5600 rpm
 * Torque: 142 Nm at 2400 rpm
 * RB20DET-R
 * twin-cam, turbocharged
 * Power: 210 PS at 6400 rpm
 * Torque: 245 Nm at 4800 rpm
 * RB20DE NEO
 * twin-cam
 * Power: 155 PS
 * Torque: 186 Nm