Great Photo Print : Auto Union Type C Stromlinie - Bernd Rosemeyer - Avus 1937. Limited Edition 06/50 Pcs - Size 70x50 cm. The Auto Union Grand Prix racing cars types A to D were developed and built by a specialist racing department of Auto Union's Horch works in Zwickau, Germany, between 1933 and 1939. Of the 4 Auto Union racing cars, the Types A, B and C, used from 1934 to 1937 had supercharged V16 engines, and the final car, the Type D used in 1938 and 1939 (built to new 1938 regulations) had a supercharged 3L V12 that developed almost 550 horsepower. Wheelspin could be induced at over 100 mph (160 km/h),