Porsche 165ci specs: 104 x 78.9 mm (4.0945 x 3.1063 in) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 165 ci |
|---|---|
| Cylinders | 4 |
| Bore | 4.095" |
| Stroke | 3.106" |
| Compression | 10.9:1 |
| Advertised power | 165 hp |
| Years | 1989 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| M44/12 | 165 ci | 4.0945" × 3.1063" | 10.9:1 | 165 |
This family is represented by a single engine in the database: 165 ci, 4 cylinders, a 4.0945" × 3.1063" 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.