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Porsche M96.21 specs: 3.2L (194 ci) 6-cylinder, 93 x 78 mm (3.6614 x 3.0709 in) bore and stroke, 11:1 compression. Rated 250 hp, 2000–2002.
The Porsche M96.21 is oversquare — the 3.6614" bore exceeds the 3.0709" stroke by 19.2% — 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 32.3 ci (530 cc).
11:1 is high enough that pump premium or better is normally required.
It is one of 11 engines in the M96 family, sitting between the 151.34 ci and 219.4 ci members. 3 factory variants share these dimensions, rated at 250 hp across 2000–2002.
| Displacement | 194 ci / 3.2 L |
|---|---|
| Bore | 3.6614" |
| Stroke | 3.0709" |
| Cylinders | 6 |
| Compression ratio | 11:1 |
| Bore/stroke ratio | 1.192 |
| Fuel type | gas |
|---|---|
| Firing order | 1-6-2-4-3-5 |
| Advertised HP | 250 hp |
| Years | 2000–2002 |
| Bore/stroke character | 1.192 — 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 | 32.3 ci |
| Static compression | 11:1 — 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 |
|---|---|---|
| 2000 | 250 hp | M96.21 |
| 2001 | 250 hp | M96.21 |
| 2002 | 250 hp | M96.21 |
1 factory vehicle, 2000–2002. Each year opens that model's engine table.