The Adler Fahrradwerke produced bicycles, typewriters, and motorcycles in addition to cars since 1900. Before World War I, the company use De Dion two-and-four cylinder engines in cars that ranged from 1032 cc to 9081 cc.
In 1902, Edmund Rumpler, an Austrian automobile and aircraft designer, became technical director; they used their own engines as well. These cars were driven by Erwin Kleyer and Otto Kleyer, sons of the company founder Heinrich Ludwig Kleyer.
The Adler Trumpf Rennlimousine was designed to participate in mayor competitions of endurance races like the Grand Prix d’Endurance les 24 Heures du Mans and Spa Francorchamps in 1936, 1937 and 1938 by outstanding German aerodynamics expert Baron Reinhard von Koenig-Fachsenself. Using Paul Jaray patent, the Baron Reinhard developed a lightweight low drag body on the Adler Trumpf from the wheel drive platform.
In 1937, Anne-Cécile Rose Itier, one of the few ladies in auto racing entered in the ‘Le Mans 24 Houers’ driving the Adler Trumpf Rennlimousine No. 35 -tehnically speaking, the Adler Trumpf Rennlimousine was a two-seater coupe- together with Baron Fritz ‘Huschke’ von hasteins, the famous ‘Racing Baron’.
The Adler Super Trumpf Rennlimousine with number 28 and piloted by Peter Graff Orssich and Rudolf Sauerwein finished 6th overall and 1st in Class 2.0 liter at Le Mans in 1938. Another Adler Trumpf Rennlimousine with number 33, held by Otto Löhr and Count Otto von Gilleaume Paul, won the 7 place overall and victory in Class 1.5 L.
