Jeep AMC Straight-4 specs: 3.875 x 3.188 in (98.4 x 81 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 150 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.875" |
| Stroke | 3.188" |
| Compression | 9.1:1 |
| Advertised power | 120 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| EPE | 150 ci | 3.875" × 3.1875" | 9.1:1 | 120 |
This family is represented by a single engine in the database: 150 ci, 4 cylinders, a 3.875" × 3.1875" 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.