Bore, stroke, displacement and compression for all 2 Mercedes-Benz 152ci engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 152 ci |
|---|---|
| Cylinders | 5, 6 |
| Bore | 3.425–3.465" |
| Stroke | 2.693–3.307" |
| Compression | 11.2–22.0:1 |
| Years | 1990–2007 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| M272 | 152 ci | 3.4646" × 2.6929" | 11.2:1 | — |
| OM602.962 | 152 ci | 3.4252" × 3.3071" * | 22:1 | — |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 11.2:1 to 22:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
1 of 2 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.