Mercedes-Benz 131ci specs: 83 x 99 mm (3.2677 x 3.8976 in) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 131 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.268" |
| Stroke | 3.898" |
| Compression | 16.2:1 |
| Advertised power | 161–195 hp |
| Years | 2014–2022 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| OM651 | 131 ci | 3.2677" × 3.8976" | 16.2:1 | 161–195 |
This family is represented by a single engine in the database: 131 ci, 4 cylinders, a 3.2677" × 3.8976" bore and stroke.
All are undersquare — stroke larger than bore, favouring torque low in the range.
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.