BMW 364ci specs: 89 x 80 mm (3.5039 x 3.1496 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 364 ci |
|---|---|
| Cylinders | 12 |
| Bore | 3.504" |
| Stroke | 3.150" |
| Compression | 10.0–11.3:1 |
| Advertised power | 438 hp |
| Years | 2003–2015 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| N73B60 | 364 ci | 3.5039" × 3.1496" | 11.3:1 | 438 |
| N74B60 | 364 ci | 3.5039" × 3.1496" | 10:1 | — |
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.