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Porsche 930/25 specs: 3.2L (193.08 ci) 6-cylinder, 95 x 74.4 mm (3.7402 x 2.9291 in) bore and stroke, 9.5:1 compression. Rated 214 hp, 1987–1989.
The Porsche 930/25 is oversquare — the 3.7402" bore exceeds the 2.9291" stroke by 27.7% — a layout that favors airflow and RPM over leverage at the crank. The 2.9291" stroke does not reach 4,000 ft/min of mean piston speed until about 8,200 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 32.2 ci (527 cc).
9.5:1 is in the range that usually runs on pump premium.
It is one of 15 engines in the 930 family, sitting between the 182.6 ci and 201.32 ci members. 3 factory variants share these dimensions, rated at 214 hp across 1987–1989.
| Displacement | 193.08 ci / 3.2 L |
|---|---|
| Bore | 3.7402" |
| Stroke | 2.9291" |
| Cylinders | 6 |
| Compression ratio | 9.5:1 |
| Bore/stroke ratio | 1.277 |
| Valvetrain | SOHC |
|---|---|
| Fuel type | gas |
| Advertised HP | 214 hp |
| Years | 1987–1989 |
| Bore/stroke character | 1.277 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,929 ft/min — conservative for a street engine |
| Displacement per cylinder | 32.2 ci |
| Static compression | 9.5:1 — 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 |
|---|---|---|
| 1987 | 214 hp | 930/25 |
| 1988 | 214 hp | 930/25 |
| 1989 | 214 hp | 930/25 |
1 factory vehicle, 1987–1989. Each year opens that model's engine table.