Bore, stroke, displacement and compression for all 37 Ford 351ci engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 351 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.632–4.002" |
| Stroke | 3.500–4.245" |
| Compression | 7.7–11.5:1 |
| Advertised power | 135–570 hp |
| Years | 1969–2019 |
| Cylinder head data | 13 of 37 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Ford 351ci · 4.002" × 3.500" · 9.45:1 | 351 ci | 4.002" × 3.5" | 9.45:1 | 246–266 |
| Ford 351ci · 4.002" × 3.500" · 9.28:1 | 351 ci | 4.002" × 3.5" | 9.28:1 | 154–177 |
| Ford 351ci · 4.002" × 3.500" · 9.4:1 | 351 ci | 4.002" × 3.5" | 9.4:1 | 156–300 |
| 1974 351 163HP | 351 ci | 4.002" × 3.5" | 9.282:1 | 163 |
| 1974 351 162HP | 351 ci | 4.002" × 3.5" | 9.402:1 | 162 |
| 1974 351 255HP | 351 ci | 4.002" × 3.5" | 9.454:1 | 255 |
| Ford 351ci · 4.002" × 3.500" · 8.622:1 | 351 ci | 4.002" × 3.5" | 8.622:1 | 148–152 |
| Ford 351ci · 4.002" × 3.500" · 9.702:1 | 351 ci | 4.002" × 3.5" | 9.702:1 | 143–154 |
| Ford 351ci · 4.002" × 3.500" · 8.702:1 | 351 ci | 4.002" × 3.5" | 8.702:1 | 140–165 |
| 1977 351 161HP | 351 ci | 4.002" × 3.5" | 8.322:1 | 161 |
| Ford 351ci · 4.002" × 3.500" · 7.742:1 | 351 ci | 4.002" × 3.5" | 7.742:1 | 145–152 |
| 1979 351 151HP | 351 ci | 4.002" × 3.5" | 8.32:1 | 151 |
| Ford 351ci · 4.002" × 3.500" · 8.7:1 | 351 ci | 4.002" × 3.5" | 8.7:1 | 135–142 |
| 2019 351 570HP | 351 ci | 3.632" × 4.245" | 11.5:1 | 570 |
| 351M 2V | 351 ci | 4.002" × 3.5" | — | 136–156 |
| 351W 2V | 351 ci | 4.002" × 3.5" | — | 156 |
| 351W HO 4V | 351 ci | 4.002" × 3.5" | — | 210 |
| 351W EFI | 351 ci | 4.002" × 3.5" | — | 210 |
| Windsor 351 HO | 351 ci | 4.002" × 3.5" | — | 165–180 |
| 351 V-8 | 351 ci | 4.002" × 3.5" | — | 136–156 |
| 5.8L V-8 | 351 ci | 4.002" × 3.5" | — | 156 |
| 351 Windsor 2V | 351 ci | 4.002" × 3.5" | — | 150 |
| 351 Windsor HO 4V | 351 ci | 4.002" × 3.5" | — | 210 |
| 351 Windsor EFI | 351 ci | 4.002" × 3.5" | — | 200–210 |
| 351 Windsor HO | 351 ci | 4.002" × 3.5" | — | 240 |
| 5.8L HO | 351 ci | 4.002" × 3.5" | — | 210 |
| 5.8L EFI | 351 ci | 4.002" × 3.5" | — | 200–210 |
| H-code 351W-2V | 351 ci | 4.002" × 3.5" | — | 250 |
| M-code 351W-4V | 351 ci | 4.002" × 3.5" | — | 290 |
| H-code | 351 ci | 4.002" × 3.5" | — | 161–250 |
| M-code 351C-4V | 351 ci | 4.002" × 3.5" | — | 285–300 |
| Ford 351ci (1970) | 351 ci | 4.002" × 3.5" | — | 250–300 |
| H | 351 ci | 4.002" × 3.5" | — | 153–250 |
| M-code | 351 ci | 4.002" × 3.5" | — | 285–300 |
| Q-code | 351 ci | 4.002" × 3.5" | — | 248–280 |
| R-code | 351 ci | 4.002" × 3.5" | — | 275–330 |
| H-code 351-2V | 351 ci | 4.002" × 3.5" | — | 240 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 7.742:1 to 11.5:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
The family mixes oversquare and undersquare designs, so members behave quite differently despite sharing a name.
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.