See other engines in this family
Mercedes-Benz OM602.962 specs: 2.5L (152 ci) 5-cylinder, 87 x 84 mm (3.4252 x 3.3071 in) bore and stroke, 22:1 compression. Built 1990–1993.
The Mercedes-Benz OM602.962 is close to square: 3.4252" bore against 3.3071" stroke, within 3.6%, which splits the difference between a high-revving layout and a torque layout. The 3.3071" stroke does not reach 4,000 ft/min of mean piston speed until about 7,250 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 5 cylinders displaces 30.4 ci (498 cc).
At 22:1 this is a compression-ignition engine: the ratio is the heat source that lights the fuel, not a knock limit to be managed.
It is one of 2 engines in the Mercedes-Benz 152ci family, all of them 152 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions across 1990–1993.
| Displacement | 152 ci / 2.5 L |
|---|---|
| Bore | 3.4252" * |
| Stroke | 3.3071" * |
| Cylinders | 5 |
| Compression ratio | 22:1 |
| Bore/stroke ratio | 1.036 |
* Bore and stroke from a single source; not yet cross-verified.
| Fuel type | diesel |
|---|---|
| Years | 1990–1993 |
| Bore/stroke character | 1.036 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,307 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.4 ci |
| Static compression | 22:1 — high enough that pump premium or better is normally required |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1990 | — | OM602.962 |
| 1991 | — | OM602.962 |
| 1992 | — | OM602.962 |
| 1993 | — | OM602.962 |
1 factory vehicle, 1990–1993. Each year opens that model's engine table.