Chevrolet 138ci specs: 3.625 x 3.35 in (92.1 x 85.1 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 138 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.625" |
| Stroke | 3.350" |
| Compression | 11.9:1 |
| Advertised power | 180 hp |
| Years | 1990–1991 |
| Cylinder head data | 1 of 1 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Chevrolet 138ci · 3.625" × 3.350" · 11.9:1 | 138 ci | 3.625" × 3.35" | 11.9:1 | 180 |
This family is represented by a single engine in the database: 138 ci, 4 cylinders, a 3.625" × 3.35" 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.