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Infiniti VQ35DD specs: 3.5L (213.6 ci) 6-cylinder, 95.5 x 81.4 mm (3.7598 x 3.2047 in) bore and stroke, 11:1 compression. Rated 295 hp. DOHC.
The Infiniti VQ35DD is oversquare — the 3.7598" bore exceeds the 3.2047" stroke by 17.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.2047" stroke does not reach 4,000 ft/min of mean piston speed until about 7,500 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 35.6 ci (583 cc).
11:1 on aluminum heads is high enough that pump premium or better is normally required.
It is one of 14 engines in the VQ family, sitting between the 121.9 ci and 243.9 ci members. Factory fitments include the Infiniti QX60.
| Displacement | 213.6 ci / 3.5 L |
|---|---|
| Bore | 3.7598" |
| Stroke | 3.2047" |
| Cylinders | 6 |
| Compression ratio | 11:1 |
| Bore/stroke ratio | 1.173 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 295 hp |
| Bore/stroke character | 1.173 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,205 ft/min — conservative for a street engine |
| Displacement per cylinder | 35.6 ci |
| Static compression | 11:1 — high enough that pump premium or better is normally required |
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