Mercedes-Benz M21 engine
| Mercedes-Benz M21 | |
|---|---|
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1933–1936 |
| Layout | |
| Configuration | Straight-six |
| Displacement | 2.0 L (122 cu in) |
| Cylinder bore | 70 mm (2.8 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 | 40 hp (30 kW) |
| Torque output | 83 lb⋅ft (113 N⋅m) |
The Mercedes-Benz M21 engine is a naturally-aspirated, 2.0-liter, straight-6, internal combustion piston engine, designed, developed and produced by Mercedes-Benz; between 1933 and 1936.[1][2][3][4][5][6][7]
M21 Engine
[edit]The side-valve six-cylinder engine had a capacity of 1,961 cc which produced a claimed maximum output of 40 PS (29 kW; 39 hp) at 3,200 rpm. The engine shared its 85 mm (3.3 in) piston stroke length with the smaller 6-cylinder unit fitted in the manufacturer's W15 model, but for the W21 the bore was increased by 5 mm (0.20 in) to 70 mm (2.8 in). The stated top speed was 98 km/h (61 mph) for the standard length and 95 km/h (59 mph) for the long bodied cars. Power from the engine passed to the rear wheels through a four-speed manual transmission in which the top gear was effectively an overdrive ratio. The top two ratios featured synchromesh. The brakes operated on all four wheels via a hydraulic linkage.[8]
During the model's final year, Mercedes-Benz announced, in June 1936, the option of a more powerful 2,229 cc 55 PS (40 kW; 54 hp) engine, which was seen as a necessary response to criticism of the car's leisurely performance in long bodied form.[9]
Applications
[edit]References
[edit]- ^ Greene, Nik (27 September 2021). Mercedes-Benz Saloon Coupe: The Complete Story. Crowood Press. ISBN 9781785009341. Retrieved 10 November 2021 – via Google Books.
- ^ "Mercedes-Benz M21 Engine". Sportlichleicht.com. Retrieved 10 November 2021.
- ^ "MERCEDES BENZ Typ 200 Pullman (W21) specs & photos – 1934, 1935, 1936". Autoevolution.com. Retrieved 10 November 2021.
- ^ "MERCEDES BENZ Typ 200 (W21) specs & photos – 1933, 1934, 1935, 1936". Autoevolution.com. Retrieved 10 November 2021.
- ^ "200 (W 21), 1933 – 1936". Mercedes-benz-publicarchive.com. Retrieved 10 November 2021.
- ^ "Mercedes-Benz E-Class History From 1926 To 2020: The Tale Of The Essential Executive Car". Carscoops.com. 22 August 2020. Retrieved 10 November 2021.
- ^ "Sports Car Market magazine – August 2008". Keith Martin. Retrieved 10 November 2021 – via Google Books.
- ^ Oswald, pp. 239 & 243
- ^ Oswald, p. 241