Bore, stroke, displacement and compression for all 3 Infiniti VH engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 252–274.2 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.661–3.661" |
| Stroke | 2.992–3.256" |
| Compression | 10.2–10.5:1 |
| Advertised power | 266–278 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| VH45DE | 274.2 ci | 3.661" × 3.256" | 10.2:1 | 278 |
| VH45DE | 274 ci | 3.6614" × 3.2559" | 10.2:1 | 278 |
| VH41DE | 252 ci | 3.6614" × 2.9921" | 10.5:1 | 266 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
All 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.