Nissan RB engine

The RB engine is an oversquare 2.03.0 L straight-6 four-stroke gasoline engine from Nissan, originally produced from 1985 to 2004. The RB followed the 1983 VG-series V6 engines to offer a full, modern range in both straight or V layouts.

Nissan RB engine
RB26DETT in an R34 Skyline GT-R
Overview
ManufacturerNissan (Nissan Machinery)
Production1985–2004 ( 2019 - Present)
Layout
ConfigurationStraight-six
Displacement2.0 L; 121.9 cu in (1,998 cc)
2.4 L; 148.2 cu in (2,428 cc)
2.5 L; 152.4 cu in (2,498 cc)
2.6 L; 156.7 cu in (2,568 cc)
2.8 L; 169.0 cu in (2,770 cc)
3.0 L; 180.8 cu in (2,962 cc)
Cylinder bore78 mm (3.07 in)
86 mm (3.39 in)
87 mm (3.43 in)
Piston stroke69.7 mm (2.74 in)
71.7 mm (2.82 in)
73.7 mm (2.90 in)
77.7 mm (3.06 in)
85 mm (3.35 in)
Cylinder block materialCast iron
Cylinder head materialAluminium
ValvetrainSOHC 2 valves x cyl.
DOHC 4 valves x cyl. with NVCS
Compression ratio7.8:1-10:1
Combustion
TurbochargerSingle Garrett T3; Twin Garrett T28-type ceramic with intercooler (RB26DETT)
Fuel systemCarburetor
Electronic Fuel injection
ManagementHitachi, NICS, ECCS
Fuel typeGasoline
Autogas
LPG
Cooling systemWater-cooled
Output
Power output94–500 PS (93–493 hp; 69–368 kW)
Torque output142–540 N⋅m (14–55 kg⋅m; 105–398 lb⋅ft)
Chronology
PredecessorNissan L engine
Black ‘202’ (Holden)
SuccessorNissan VQ engine
Nissan VR engine
ECOTEC V6 (Holden)

The RB engine family includes single overhead camshaft (SOHC) and double overhead camshaft (DOHC) engines. Both SOHC and DOHC versions have an aluminium head. The SOHC versions have 2 valves per cylinder and the DOHC versions have 4 valves per cylinder; each cam lobe moves only one valve. All RB engines have belt driven cams and a cast iron block. Most turbo models have an intercooled turbo (the exceptions being the single cam RB20ET & RB30ET engines), and most have a recirculating factory blow off valve (the exceptions being when fitted to Laurels and Cefiros) to reduce compressor surge when the throttle quickly closes.

The RB engines are derived from the six-cylinder L20A engine, which has the same bore and stroke as the RB20. All RB engines were made in Yokohama, Japan where the VR38DETT engine was made. Some RB engines were rebuilt by Nissan's NISMO division at the Omori Factory in Tokyo as well. All Z-Tune Skylines were rebuilt at the Omori Factory.

Production of the RB series resumed in 2019, after a 15-year hiatus.

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