BMW 244ci specs: 92 x 75.2 mm (3.6220 x 2.9606 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 244 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.622" |
| Stroke | 2.961" |
| Compression | 12.0:1 |
| Advertised power | 414 hp |
| Years | 2008–2013 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| S65B40 | 244 ci | 3.622" × 2.9606" | 12:1 | 414 |
This family is represented by a single engine in the database: 244 ci, 8 cylinders, a 3.622" × 2.9606" 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.