Auto Union Typ D '1938
Auto Union Typ D '1938
Auto Union Typ D '1938
The modified Grand Prix rules of 1938 limited the volume of compressor engines to 3 liters, and the weight of the cars to 850 kg. The 16-cylinder Auto Union Type C had to be completely redesigned to comply with these regulations.
Design Auto Union Typ D '1938
This was taken up by Professor Eberan von Eberhorst, since Ferdinand Porsche had by that time ceased to cooperate with Auto Union.
Design Auto Union Typ D '1938
A new 3.0-liter V12 Roots supercharged engine with 420 hp was installed on the chassis of the race car. Like the V16 from the Typ C, it had a single overhead camshaft that drove the intake valves via tappets, but the exhaust valves were now controlled by two additional shafts. An exhaust pipe ran out to the side of each cylinder.
Design Auto Union Typ D '1938
The power unit was located in the back, and between it and the driver there was a fuel tank with two side chambers. The front suspension remained on transverse torsion bars, and in the rear, instead of a transverse spring, a De Dion axle with longitudinal torsion bars was installed.
Design Auto Union Typ D '1938
The Typ D made its debut at the French Grand Prix against the Mercedes-Benz W154. During the season, Nuvolari won only the Grand Prix at Monza and Donington.
Design Auto Union Typ D '1938
The power of the car was increased to 485 hp, equipped with two superchargers. Nuvolari, Stuck and Müller won the Grand Prix in Belgrade, Bucharest and Reims respectively, but overall the championship was again won by Mercedes-Benz.
Under the hood Auto Union Typ D '1938
After that, a struggle began between Auto Union from Zwickau and Mercedes-Benz from Stuttgart, which ended with the outbreak of World War II. To participate in the races, cars with a maximum weight of 750 kilograms were allowed without fuel, water, tires and a driver.
Design Auto Union Typ D '1938
There were no limits to engine power and turbochargers were allowed. These rules were in effect until the end of 1937. In the period 1934-1939, the factory team took part in 59 circuit races.
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Auto Union Typ D '1938
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