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Mercedes-Benz M110 specs: 2.8L (168 ci) 6-cylinder, 86 x 78.8 mm (3.3858 x 3.1024 in) bore and stroke. Rated 142 hp, 1975–1980.
The Mercedes-Benz M110 is oversquare — the 3.3858" bore exceeds the 3.1024" stroke by 9.1% — a layout that favors airflow and RPM over leverage at the crank. The 3.1024" stroke does not reach 4,000 ft/min of mean piston speed until about 7,750 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 28.0 ci (459 cc).
7 factory variants share these dimensions, rated at 142 hp across 1975–1980.
| Displacement | 168 ci / 2.8 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.1024" |
| Cylinders | 6 |
| Configuration | I6 |
| Bore/stroke ratio | 1.091 |
| Fuel type | gas |
|---|---|
| Advertised HP | 142 hp |
| Years | 1975–1980 |
| Bore/stroke character | 1.091 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,102 ft/min — conservative for a street engine |
| Displacement per cylinder | 28.0 ci |
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 |
|---|---|---|
| 1975 | — | M110 |
| 1976 | — | M110 |
| 1978 | — | M110 |
| 1978 | 142 hp | M110 |
| 1979 | — | M110 |
| 1979 | 142 hp | M110 |
| 1980 | — | M110 |
2 factory vehicles, 1975–1980. Each year opens that model's engine table.