Isuzu 122ci specs: 88 x 82 mm (3.4646 x 3.2283 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 122 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.465" |
| Stroke | 3.228" |
| Compression | 7.9:1 |
| Advertised power | 140 hp |
| Years | 1985–1989 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 4ZC1-T | 122 ci | 3.4646" × 3.2283" | 7.9:1 | 140 |
This family is represented by a single engine in the database: 122 ci, 4 cylinders, a 3.4646" × 3.2283" bore and stroke.
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.