See other engines in this family
Porsche M96 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 296-300 hp, 1999–2001.
The Porsche M96 (M96) 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.
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 from 296 to 300 hp across 1999–2001.
| 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 |
| Firing order | 1-6-2-4-3-5 |
| Advertised HP | 296–300 hp |
| Years | 1999–2001 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1999 | M96/01 net | 296 @ 6800 | 258 lb-ft @ 4600 | 11.3:1 |
| 2000 | M96/01 | 300 @ 6800 | 258 lb-ft @ 4600 | 11.3:1 |
| 2001 | M96/01 | 300 @ 6800 | 258 lb-ft @ 4600 | 11.3:1 |
Factory specification sheet.
| 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 |
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 |
|---|---|---|
| 1999 | 296 hp | M96 |
| 2000 | 300 hp | M96 |
| 2001 | 300 hp | M96 |
1 factory vehicle, 1999–2001. Each year opens that model's engine table.