BMW 149ci specs: 80 x 81 mm (3.1496 x 3.1890 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 149 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.150" |
| Stroke | 3.189" |
| Compression | 22.0:1 |
| Advertised power | 115 hp |
| Years | 1985–1986 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| M21D24 | 149 ci | 3.1496" × 3.189" | 22:1 | 115 |
This family is represented by a single engine in the database: 149 ci, 6 cylinders, a 3.1496" × 3.189" bore and stroke.
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.