Mercedes-Benz M21 engine

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Mercedes-Benz M21
Overview
Manufacturer Mercedes-Benz
Production1933–1936
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]

Contents

M21 Engine

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

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References

  1. ↑ Greene, Nik (27 September 2021). Mercedes-Benz Saloon Coupe: The Complete Story. Crowood Press. ISBN   9781785009341 . Retrieved 10 November 2021– via Google Books.
  2. ↑ "Mercedes-Benz M21 Engine". Sportlichleicht.com. Retrieved 10 November 2021.
  3. ↑ "MERCEDES BENZ Typ 200 Pullman (W21) specs & photos – 1934, 1935, 1936". Autoevolution.com. Retrieved 10 November 2021.
  4. ↑ "MERCEDES BENZ Typ 200 (W21) specs & photos – 1933, 1934, 1935, 1936". Autoevolution.com. Retrieved 10 November 2021.
  5. ↑ "200 (W 21), 1933 – 1936". Mercedes-benz-publicarchive.com. Retrieved 10 November 2021.
  6. ↑ "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.
  7. ↑ "Sports Car Market magazine – August 2008". Keith Martin. Retrieved 10 November 2021– via Google Books.
  8. ↑ Oswald, pp. 239 & 243
  9. ↑ Oswald, p. 241
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