M 125
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Mercedes-Benz M 125
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Technical Data: Mercedes-Benz M125 Grand Prix Engine (1937)
| Technical Parameter | Specification & Data |
|---|---|
| Engine Code | M 125 F |
| Production / Racing Year | 1937 (Rendered obsolete in 1938 by a new 3.0L rules cap) |
| Engine Configuration | Front-mounted, Supercharged Straight-8 (Inline-8) |
| Displacement | 5,663 cc (5.66 Liters / 345.5 cu in) |
| Bore x Stroke | 94.0 mm × 102.0 mm (3.70 in × 4.02 in) |
| Valvetrain | Gear-driven Double Overhead Camshafts (DOHC), 4 valves per cylinder (32 valves total) |
| Aspiration | Single Roots-type mechanical supercharger (mounted downstream of the carburetor) |
| Compression Ratio | 8.8:1 |
| Max Power Output (Race Trim) | 560 to 595 hp (418–444 kW) @ 5,800 RPM |
| Max Power Output (Test Bench) | 637 to 646 hp (468–475 kW) @ 5,800 RPM |
| Maximum Torque | 857 Nm (632 lb-ft) @ ~4,000 RPM |
| Engine Dry Weight | 222 kg (489 lbs)—accounting for roughly 30% of the entire car's weight |