Mercedes-Benz 171ci specs: 89.9 x 73.5 mm (3.5394 x 2.8937 in) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.
| Displacement | 171 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.539" |
| Stroke | 2.894" |
| Compression | 10.0:1 |
| Years | 1993–2000 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| M104 | 171 ci | 3.5394" × 2.8937" | 10:1 | — |
| M112 | 171 ci | 3.5394" × 2.8937" | 10:1 | — |
| M104.942 | 171 ci | 3.5394" × 2.8937" | 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.