American Motors 258ci specs: 3.75 x 3.90 in (95.3 x 99.1 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.
| Displacement | 258 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.750" |
| Stroke | 3.900" |
| Compression | 8.7:1 |
| Advertised power | 110–150 hp |
| Years | 1971–1980 |
| Cylinder head data | 1 of 2 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| American Motors 258ci (1971–1980) | 258 ci | 3.75" × 3.9" | — | 110–150 |
| American Motors 258ci · 3.75" × 3.9" · 8.67:1 | 258 ci | 3.75" × 3.9" | 8.67:1 | 110 |
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.