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Nissan RB30E specs: 3.0L (182.7 ci) 6-cylinder, 86 x 85 mm (3.3858 x 3.3465 in) bore and stroke, 9:1 compression. Rated 155 hp. Rod ratio and piston speed.
The Nissan RB30E is close to square: 3.3858" bore against 3.3465" stroke, within 1.2%, which splits the difference between a high-revving layout and a torque layout. The 3.3465" stroke does not reach 4,000 ft/min of mean piston speed until about 7,150 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 30.5 ci (499 cc).
9:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 11 engines in the RB family, the largest at 182.7 ci. Factory fitments include the Nissan Skyline R31 (Australia), Nissan Patrol Y60 (Australia), Holden Commodore VL.
| Displacement | 182.7 ci / 3 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.3465" |
| Cylinders | 6 |
| Compression ratio | 9:1 |
| Bore/stroke ratio | 1.012 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 155 hp |
| Bore/stroke character | 1.012 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,347 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.4 ci |
| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
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