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BMW S62B50 specs: 4.9L (302 ci) 8-cylinder, 94 x 89 mm (3.7008 x 3.5039 in) bore and stroke, 11:1 compression. Rated 394 hp, 2000–2003.
The BMW S62B50 is oversquare — the 3.7008" bore exceeds the 3.5039" stroke by 5.6% — a layout that favors airflow and RPM over leverage at the crank. The 3.5039" stroke puts mean piston speed at 4,000 ft/min around 6,850 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 37.8 ci (619 cc).
11:1 is high enough that pump premium or better is normally required.
4 factory variants share these dimensions, rated at 394 hp across 2000–2003.
| Displacement | 302 ci / 4.9 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 3.5039" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 11:1 * |
| Bore/stroke ratio | 1.056 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 394 hp |
| Years | 2000–2003 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2000 | S62B50 net | 394 | 368 lb-ft | — |
| 2001 | S62B50 net | 394 | 368 lb-ft | — |
| 2002 | S62B50 net | 394 | 368 lb-ft | — |
| 2003 | S62B50 net | 394 | 368 lb-ft | — |
Factory specification sheet.
| Bore/stroke character | 1.056 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,504 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 37.8 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 | 394 hp | S62B50 |
| 2001 | 394 hp | S62B50 |
| 2002 | 394 hp | S62B50 |
| 2003 | 394 hp | S62B50 |
1 factory vehicle, 2000–2003. Each year opens that model's engine table.