DKW RT 100

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DKW RT 3 PS (2013-09-03 museum mobile Sp) .jpg
DKW RT 100
Manufacturer Auto Union
Production period 1934 to 1940
class motorcycle
Motor data
Single cylinder two-stroke engine with reverse scavenging
Displacement  (cm³) 98.2
Power  (kW / PS ) 2.2 / 3
Top speed (  km / h) 65
transmission 3 courses
drive Chain
Brakes drums
Wheelbase  (mm) 1225
Dimensions (L × W × H, mm): 1950
Seat height (cm) approx. 70
Empty weight  (kg) approx. 50
successor DKW RT 125

The DKW RT 100 ( "Empire type") is a motorcycle of DKW . It was designed by DKW chief designer Hermann Weber , presented to the public for the first time in 1934 and produced over 70,000 times by the end of production.

The motorcycle was also known under the names RT 2½ HP and RT 3 HP , derived from the engine power .

At that time, the kickstarter instead of pedals (“bicycle with auxiliary motor”) and the three-speed gearshift were unusual for a motorcycle in this displacement class . The machine was a "real" motorcycle and cost 345 Reichsmarks . The DKW RT 100 was the best-selling DKW motorcycle in the 1930s.


The DKW RT 100 has an air-cooled single cylinder - two-stroke engine with flat piston and a Schnürle - reverse circulation . Bore and stroke are each 50 mm; this results in a displacement of 98 cm³. The compression was initially 5.7: 1, after the increase in performance in 1936 it was 5.9: 1. A two-stroke mixture with an oil to gasoline ratio of 1:20 is required for lubrication . The top speed of the DKW RT 100 is - depending on the model - at 55 to 65 km / h. It has a manual three-speed gearbox, initially with a straight gear stick directly on the gearbox, which was replaced after about 200 pieces by a short gear lever guided in a backdrop on the tank. A single roller chain covered with a mudguard transfers the power from the gearbox to the rear wheel.

The machine has a closed monotube frame and a parallelogram fork , initially with a coil spring and from 1936 with a rubber spring. The rear wheel of the 45 kg RT 100 and the 50 kg RT 3 PS had no suspension.

DKW RT 3 PS from 1939, except for the speedometer and rearview mirror required by the TÜV in original condition

Model overview

DKW RT 100 (2½ HP) DKW RT 100 (3 HP)
construction time 1934-1936 1936-1940
number of pieces 10,000 61,850
power 2.5 hp 3 hp
Top speed 60 km / h 65 km / h

Production of the DKW RT 100 was stopped in 1940. The successor model DKW RT 125 was technically based on the RT 100 and became the most copied motorcycle in the world.


  • Stefan Knittel, Klaus Vollmar: Schrader Motor-Chronik, DKW- Motorräder 1922–1958 , Motorbuch Verlag, Stuttgart 2001, ISBN 3-613-87221-8
  • Till Schauen: It's a family matter . In: Oldtimer-Praxis , 7/2004, pp. 60–63 (article about the DKW RT 100, built in 1940)
  • Christoph Heise: Flinker Pfennigfuchser , in: Oldtimer-Praxis , 12/1991, pp. 16-18 (article about the DKW RT 100)