Dodge 251ci specs: 3.438 x 4.50 in (87.3 x 114.3 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 251 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.438" |
| Stroke | 4.500" |
| Years | 1961–1968 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Dodge 251ci (1961–1968) | 251 ci | 3.4375" × 4.5" | — | — |
This family is represented by a single engine in the database: 251 ci, 6 cylinders, a 3.4375" × 4.5" bore and stroke.
All are undersquare — stroke larger than bore, favouring torque low in the range.
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.