Plymouth Neon specs: 3.445 x 3.268 in (87.5 x 83 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 122 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.445" |
| Stroke | 3.268" |
| Compression | 9.8:1 |
| Advertised power | 132 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 20 Neon I4 | 122 ci | 3.4449" × 3.2677" | 9.8:1 | 132 |
This family is represented by a single engine in the database: 122 ci, 4 cylinders, a 3.4449" × 3.2677" 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.