The Mercedes-Benz M15 engine is a naturally-aspirated, 1.7-liter, straight-6, internal combustion piston engine, designed, developed and produced by Mercedes-Benz; between 1931 and 1936.[1][2][3]
| Mercedes-Benz M15 engine | |
|---|---|
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1931-1936 |
| Layout | |
| Configuration | L-6 |
| Displacement | 1.7 L (104 cu in) |
| Cylinder bore | 65 mm (2.6 in) |
| Piston stroke | 85 mm (3.3 in) |
| Valvetrain | 12-valve, SOHC, two-valves per cylinder |
| Compression ratio | 5.75:1 |
| Combustion | |
| Fuel system | Carburetor |
| Fuel type | Gasoline |
| Oil system | Dry sump |
| Output | |
| Power output | 32 hp (24 kW) |
| Torque output | 52.5 lb⋅ft (71 N⋅m) |
The car was powered by a six-cylinder 1,692 cc engine:[4] maximum power was set at 23.5 kW (32 PS; 32 hp) at 3,200 rpm. The engine featured central lubrication and the water-based cooling system for the engine employed both a pump and a thermostat. Power was transmitted to the rear wheels via what was in effect a four-speed manual transmission, on which the top gear operated as a form of overdrive. Third gear used the 1:1 ratio conventionally used by a top gear, and there was a fourth gear with a ratio of 1 : 0.73. Fuel economy was quoted as 11 litres per 100 kilometres (26 mpg‑imp; 21 mpg‑US) and top speed 90 km/h (56 mph), which combined to represent a competitive level of performance in the passenger car market of that time.