American Motors 121ci specs: 3.405 x 3.323 in (86.5 x 84.4 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 121 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.405" |
| Stroke | 3.323" |
| Compression | 8.1:1 |
| Years | 1977–1979 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| American Motors 121ci (1977–1979) | 121 ci | 3.4055" × 3.3228" | 8.1:1 | — |
This family is represented by a single engine in the database: 121 ci, 4 cylinders, a 3.4055" × 3.3228" bore and stroke.
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.