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  Mercedes-Benz W25
 

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Country of origin:Germany
Produced from:1934 - 1935
Successor:Mercedes-Benz W25K
Author:Wouter Melissen
Last updated:July 22, 2009
Download: All images

Engine
Configuration M25A Straight 8
Location Front, longitudinally mounted
Weight 204 kilo / 449.7 lbs
Construction forged-steel block and head
Displacement 3,360 cc / 205 cu in
Bore / Stroke 78.0 mm (3.1 in) / 88.0 mm (3.5 in)
Compression 7.5:1
Valvetrain 4 valves / cylinder, DOHC
Fuel feed 2 Mercedes Carburettors
Aspiration Roots-Type Supercharger
Power 314 bhp / 234 KW @ 5,800 rpm
BHP/Liter 93 bhp / liter

Drivetrain
Chassis aluminium body on box-section steel frame
Front suspension double wishbones, bell-crank actuated horizontal coil springs, friction dampers
Rear suspension swing axles, transverse quarter-elliptic leaf springs, friction dampers
Steering worm-and-nut
Brakes Lockheed hydraulic drums, all-round
Gearbox 4 speed Manual
Drive Rear wheel drive

Dimensions
Weight 750 kilo / 1,654 lbs
Length / Width / Height 4,040 mm (159.1 in) / 1,770 mm (69.7 in) / 1,160 mm (45.7 in)
Wheelbase / Track (fr/r) 2,725 mm (107.3 in) / 1,473 mm (58 in) / 1,412 mm (55.6 in)

Performance figures
Power to weight 0.42 bhp / kg
Top Speed 300 km/h (186 mph)

Race history
Major wins
1934 Italian Grand Prix (Rudolf Caracciola / Luigi Fagioli)
1934 Spanish Grand Prix (Luigi Fagioli)
1935 Monaco Grand Prix (Luigi Fagioli)
1935 French Grand Prix (Rudolf Caracciola)
1935 Belgian Grand Prix (Rudolf Caracciola)
1935 Swiss Grand Prix (Rudolf Caracciola)
1935 Spanish Grand Prix (Rudolf Caracciola)

Resources
Suggested reading
  • The Grand Prix Car, by Laurence Pomeroy
  • Classic Racing Cars, by Cyril Posthumus
  • Classic Grand Prix Cars, by Karl Ludvigsen
Related articles
Useful links

  Article Image gallery (21) 105194/4 Specifications User Comments (1)