Porsche M48 specs: 93 x 83 mm (3.6614 x 3.2677 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 275.3 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.661" |
| Stroke | 3.268" |
| Compression | 11.5:1 |
| Advertised power | 340 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| M48/00 | 275.3 ci | 3.6614" × 3.2677" | 11.5:1 | 340 |
This family is represented by a single engine in the database: 275.3 ci, 8 cylinders, a 3.6614" × 3.2677" 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.