Ford 250ci specs: 3.682 x 3.91 in (93.5 x 99.3 mm) bore and stroke, shared by all 6 versions. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 250 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.682" |
| Stroke | 3.910" |
| Compression | 9.0–9.8:1 |
| Advertised power | 72–155 hp |
| Years | 1969–1980 |
| Cylinder head data | 4 of 6 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Ford 250ci · 3.682" × 3.910" · 9.75:1 | 250 ci | 3.682" × 3.91" | 9.75:1 | 72–99 |
| Ford 250ci · 3.682" × 3.910" · 9.751:1 | 250 ci | 3.682" × 3.91" | 9.751:1 | 81–91 |
| 1977 250 98HP | 250 ci | 3.682" × 3.91" | 9.001:1 | 98 |
| 1980 250 90HP | 250 ci | 3.682" × 3.91" | 9.661:1 | 90 |
| L-code | 250 ci | 3.682" × 3.91" | — | 90–155 |
| Ford 250ci (1970) | 250 ci | 3.682" × 3.91" | — | 155 |
All are undersquare — stroke larger than bore, favouring torque low in the range.
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.