Jaguar 231ci specs: 87 x 106 mm (3.4250 x 4.1730 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 231 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.425" |
| Stroke | 4.173" |
| Advertised power | 265 hp |
| Years | 1961–1964 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| XK 3.8 | 231 ci | 3.425" × 4.173" | — | 265 |
This family is represented by a single engine in the database: 231 ci, 6 cylinders, a 3.425" × 4.173" 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.