Bore, stroke, displacement and compression for all 13 Infiniti VQ engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 121.9–243.9 ci |
|---|---|
| Cylinders | 6 |
| Bore | 2.992–3.760" |
| Stroke | 2.886–3.622" |
| Compression | 9.0–11.0:1 |
| Advertised power | 150–330 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| VQ40DE | 243.9 ci | 3.7598" × 3.622" | 9.7:1 | 261 |
| VQ37VHR | 225.8 ci | 3.7598" × 3.3858" | 11:1 | 328 |
| VQ37VHR | 225 ci | 3.7598" × 3.3858" | 11:1 | 330 |
| VQ · 3.760" × 3.205" · 10.3:1 | 213.6 ci | 3.7598" × 3.2047" | 10.3:1 | 255–298 |
| VQ35HR | 213.6 ci | 3.7598" × 3.2047" | 10.6:1 | 306 |
| VQ35DE | 213 ci | 3.7598" × 3.2047" | 10.3:1 | 280 |
| VQ35HR | 213 ci | 3.7598" × 3.2047" | 10.6:1 | 306 |
| VQ30DE | 182.9 ci | 3.6614" × 2.8858" | 10:1 | 190 |
| VQ30DET | 182.9 ci | 3.6614" × 2.8858" | 9:1 | 227 |
| VQ30DE | 182 ci | 3.6614" × 2.8858" | 10:1 | 190 |
| Vq25de | 152.6 ci | 3.3465" × 2.8858" | 10.3:1 | 218 |
| VQ25HR | 152 ci | 3.3465" × 2.8858" | 10.3:1 | 218 |
| VQ20DE | 121.9 ci | 2.9921" × 2.8858" | 10:1 | 150 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 9:1 to 11:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
11 of 13 are oversquare — bore larger than stroke, which favours revs over low-end torque.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.