Bore, stroke, displacement and compression for all 10 Mercury Windsor engines. Compare variants side by side.
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 351W | 351 ci | 4" × 3.5" | 9.5:1 | 250 |
| 351W EFI | 351 ci | 4" × 3.5" | 8.8:1 | 210 |
| 351W | 351 ci | 4" × 3.5" | 10.7:1 | 290 |
| Windsor · 4.000" × 3.000" · 9:1 | 302 ci | 4" × 3" | 9:1 | 150–225 |
| 302 | 302 ci | 4" × 3" | 10:1 | 230 |
| 289 | 289 ci | 4" × 2.8701" | 9.3:1 | 200 |
| 289 HiPo | 289 ci | 4" × 2.8701" | 10.5:1 | 271 |
| 260 | 260 ci | 3.7992" × 2.8701" | 8.8:1 | 164 |
| 255 | 255 ci | 3.6811" × 3" | 8.2:1 | 115–120 |
| 221 | 221 ci | 3.5" × 2.8701" | 8.7:1 | 145 |