Ford 122ci specs: 3.578 x 3.03 in (90.9 x 77 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 122 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.578" |
| Stroke | 3.030" |
| Compression | 9.8:1 |
| Advertised power | 73–85 hp |
| Years | 1973–1988 |
| Cylinder head data | 1 of 2 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Ford 122ci · 3.578" × 3.030" · 9.76:1 | 122 ci | 3.578" × 3.03" | 9.76:1 | 80–85 |
| Lima I4, 2-bbl | 122 ci | 3.578" × 3.03" | — | 73 |
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.