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Porsche M44/41 specs: 3.0L (182 ci) 4-cylinder, 104 x 88 mm (4.0945 x 3.4646 in) bore and stroke, 10.9:1 compression. Rated 208 hp, 1989–1991.
The Porsche M44/41 is oversquare — the 4.0945" bore exceeds the 3.4646" stroke by 18.2% — a layout that favors airflow and RPM over leverage at the crank. The 3.4646" stroke puts mean piston speed at 4,000 ft/min around 6,950 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 45.5 ci (746 cc).
10.9:1 is in the range that usually runs on pump premium.
3 factory variants share these dimensions, rated at 208 hp across 1989–1991.
| Displacement | 182 ci / 3 L |
|---|---|
| Bore | 4.0945" |
| Stroke | 3.4646" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10.9:1 |
| Bore/stroke ratio | 1.182 |
| Fuel type | gas |
|---|---|
| Advertised HP | 208 hp |
| Years | 1989–1991 |
| Bore/stroke character | 1.182 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,465 ft/min — conservative for a street engine |
| Displacement per cylinder | 45.5 ci |
| Static compression | 10.9:1 — in the range that usually runs on pump premium |
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 |
|---|---|---|
| 1989 | 208 hp | M44/41 |
| 1990 | 208 hp | M44/41 |
| 1991 | 208 hp | M44/41 |
1 factory vehicle, 1989–1991. Each year opens that model's engine table.