30/08/2026
The Nissan RB engine is a legendary family of straight-six, four-stroke gasoline engines produced by Nissan from 1985 to 2004, and later resumed for classic continuation production.
Nissan RB Engine — Stock Dimensions & Naming Codes
Engine Displacement Bore × Stroke
RB20 1,998 cc (2.0 L) 78 × 69.7 mm
RB24 2,428 cc (2.4 L) 86 × 69.7 mm
RB25 2,498 cc (2.5 L) 86 × 71.7 mm
RB26 2,568 cc (2.6 L) 86 × 73.7 mm
RB30 2,962 cc (3.0 L) 86 × 85.0 mm
The RB engine family uses a combination of letters to identify key characteristics of the engine configuration:
D — Double overhead camshafts (DOHC), as opposed to SOHC.
E — Electronic fuel injection.
S — Carburetted fuel system.
T — Factory-equipped turbocharger.
TT — Factory-equipped twin turbochargers.
P — Designed to operate on LPG (liquefied petroleum gas).
For example, the RB26DETT designation can be broken down as:
RB26 + D + E + TT
RB — Nissan's RB-series inline-six engine family
26 — Approximately 2.6-litre displacement
D — DOHC cylinder head
E — Electronic fuel injection
TT — Twin turbochargers
This naming system makes it possible to identify the basic architecture and induction system of an RB engine directly from its designation.