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Nissan VQ30DET specs: 3.0L (182 ci) 6-cylinder, 93 x 73.3 mm (3.6614 x 2.8858 in) bore and stroke, 9:1 compression. Rated 270 hp. Rod ratio and piston speed.
The Nissan VQ30DET is oversquare — the 3.6614" bore exceeds the 2.8858" stroke by 26.9% — a layout that favors airflow and RPM over leverage at the crank. The 2.8858" stroke does not reach 4,000 ft/min of mean piston speed until about 8,300 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 30.3 ci (497 cc).
9:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 14 engines in the VQ family, sitting between the 121.9 ci and 243.8 ci members. Factory fitments include the Nissan Gloria Y33, Nissan Cedric Y33, Nissan Cima F50.
| Displacement | 182 ci / 3 L |
|---|---|
| Bore | 3.6614" |
| Stroke | 2.8858" |
| Cylinders | 6 |
| Compression ratio | 9:1 |
| Bore/stroke ratio | 1.269 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 270 hp |
| Bore/stroke character | 1.269 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,886 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.3 ci |
| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
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