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Infiniti VR35DDTT specs: 3.5L (213 ci) 6-cylinder, 86 x 99 mm (3.3858 x 3.8976 in) bore and stroke, 10.5:1 compression. Rated 450 hp. DOHC.
The Infiniti VR35DDTT is undersquare — the 3.8976" stroke exceeds the 3.3858" bore by 13.1% — a layout that trades peak RPM for leverage and torque low in the range. The 3.8976" stroke puts mean piston speed at 4,000 ft/min around 6,150 RPM, which is where a production bottom end is generally considered at its limit. Each of the 6 cylinders displaces 35.5 ci (582 cc).
10.5:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 4 engines in the VR family, the largest at 213 ci. Factory fitments include the Infiniti QX80.
| Displacement | 213 ci / 3.5 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.8976" |
| Cylinders | 6 |
| Compression ratio | 10.5:1 |
| Bore/stroke ratio | 0.869 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 450 hp |
| Bore/stroke character | 0.869 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,898 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 35.5 ci |
| Static compression | 10.5:1 — in the range that usually runs on pump premium |
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