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Infiniti 2.0T specs: 2.0L (121 ci) 4-cylinder, 83 x 92 mm (3.2677 x 3.6220 in) bore and stroke, 9.8:1 compression. Rated 208 hp. Rod ratio and piston speed.
The Infiniti 2.0T is undersquare — the 3.622" stroke exceeds the 3.2677" bore by 9.8% — a layout that trades peak RPM for leverage and torque low in the range. The 3.622" stroke puts mean piston speed at 4,000 ft/min around 6,650 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 30.3 ci (496 cc).
9.8:1 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.
Factory fitments include the Infiniti Q50, Infiniti Q60.
| Displacement | 121 ci / 2 L |
|---|---|
| Bore | 3.2677" |
| Stroke | 3.622" |
| Cylinders | 4 |
| Compression ratio | 9.8:1 |
| Bore/stroke ratio | 0.902 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 208 hp |
| Bore/stroke character | 0.902 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.3 ci |
| Static compression | 9.8:1 — in the range that usually runs on pump premium |
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