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Porsche M96/01 specs: 3.4L (207.5 ci) 6-cylinder, 96 x 78 mm (3.7795 x 3.0709 in) bore and stroke, 11.3:1 compression. Rated 300 hp. DOHC.
The Porsche M96/01 is oversquare — the 3.7795" bore exceeds the 3.0709" stroke by 23.1% — a layout that favors airflow and RPM over leverage at the crank. The 3.0709" stroke does not reach 4,000 ft/min of mean piston speed until about 7,800 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 34.6 ci (567 cc).
11.3:1 on aluminum heads is high enough that pump premium or better is normally required.
Factory fitments include the 911 Carrera (996.1).
| Displacement | 207.5 ci / 3.4 L |
|---|---|
| Bore | 3.7795" |
| Stroke | 3.0709" |
| Cylinders | 6 |
| Compression ratio | 11.3:1 |
| Bore/stroke ratio | 1.231 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 300 hp |
| Bore/stroke character | 1.231 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,071 ft/min — conservative for a street engine |
| Displacement per cylinder | 34.6 ci |
| Static compression | 11.3:1 — high enough that pump premium or better is normally required |
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