Nash 253ci specs: 3.50 x 4.375 in (88.9 x 111.1 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 253 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.500" |
| Stroke | 4.375" |
| Advertised power | 120–140 hp |
| Years | 1952–1956 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Nash 253ci (1952–1956) | 253 ci | 3.5" × 4.375" | — | 120–140 |
This family is represented by a single engine in the database: 253 ci, 6 cylinders, a 3.5" × 4.375" 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.