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Porsche EA390 VR6 specs: 3.2L (195 ci) 6-cylinder, 84 x 95.9 mm (3.3071 x 3.7756 in) bore and stroke, 11.5:1 compression. Rated 247 hp, 2004–2006.
The Porsche EA390 VR6 is undersquare — the 3.7756" stroke exceeds the 3.3071" bore by 12.4% — a layout that trades peak RPM for leverage and torque low in the range. The 3.7756" stroke puts mean piston speed at 4,000 ft/min around 6,350 RPM, which is where a production bottom end is generally considered at its limit. Each of the 6 cylinders displaces 32.5 ci (533 cc).
11.5:1 is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
3 factory variants share these dimensions, rated at 247 hp across 2004–2006.
| Displacement | 195 ci / 3.2 L |
|---|---|
| Bore | 3.3071" |
| Stroke | 3.7756" |
| Cylinders | 6 |
| Compression ratio | 11.5:1 * |
| Bore/stroke ratio | 0.876 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 247 hp |
| Years | 2004–2006 |
| Bore/stroke character | 0.876 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,776 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 32.5 ci |
| Static compression | 11.5:1 — 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 |
|---|---|---|
| 2004 | 247 hp | EA390 VR6 |
| 2005 | 247 hp | EA390 VR6 |
| 2006 | 247 hp | EA390 VR6 |
1 factory vehicle, 2004–2006. Each year opens that model's engine table.