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Mercedes-Benz M113 specs: 5.4L (332 ci) 8-cylinder, 97 x 92 mm (3.8189 x 3.6220 in) bore and stroke. Rated 349 hp, 1999–2006.
The Mercedes-Benz M113 is oversquare — the 3.8189" bore exceeds the 3.622" stroke by 5.4% — a layout that favors airflow and RPM over leverage at the crank. The 3.622" stroke puts mean piston speed at 4,000 ft/min around 6,650 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 41.5 ci (680 cc).
It is one of 3 engines in the Mercedes-Benz 332ci family, all of them 332 ci — the differences between them are in compression, heads and rating, not displacement. 10 factory variants share these dimensions, rated at 349 hp across 1999–2006.
| Displacement | 332 ci / 5.4 L |
|---|---|
| Bore | 3.8189" |
| Stroke | 3.622" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 10.5–11:1 (published figures vary) |
| Bore/stroke ratio | 1.054 |
| Fuel type | gas |
|---|---|
| Advertised HP | 349 hp |
| Years | 1999–2006 |
| Bore/stroke character | 1.054 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 41.5 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 |
|---|---|---|
| 1999 | 349 hp | M113 |
| 2000 | 349 hp | M113 |
| 2001 | — | M113 |
| 2001 | 349 hp | M113 |
| 2002 | — | M113 |
| 2002 | 349 hp | M113 |
| 2003 | — | M113 |
| 2004 | — | M113 |
| 2005 | — | M113 |
| 2006 | — | M113 |
4 factory vehicles, 1999–2006. Each year opens that model's engine table.