Auto Union Type C

Mercedes-Benz domination in Grand Prix ended with the Auto Union Typ C. It took a few years to get it right, but Ferdinand Porsche’s daring design with a mid-mounted V16 finally won. It claimed many victories from 1936 to 1938 until the three-liter formula was laid out for 1939.

Horch, Audi, DKW and Wanderer created Auto Union with the help of Ferdinand Porsche and Adolf Rosenberger. Along with building passenger cars, a goal of the new company was to enter Grand Prix. They did so in 1934 with a daring mid-engined race car called the Typ A. This evolved into the slightly larger Typ B the following year and the Typ C was fitted with a much larger engine for 1936.

The Type-C was a third evolution of Auto Union’s racecar. It primarily competed with Mercedes-Benz but also raced against Alfa Romeo’s 12C-36, the Maserati V8RI and Bugatti 59/50. Type-Cs won six victories in 1936 and made Bernt Rosermeyer world champion.

Ferdinand Porsche designed the Type-C and championed his mid-engine design first used on the 1923 Benz Tropfenwagen. Weight distribution was his primary motivation in this choice. The driver could sit lower with no drive shaft and the front-to-rear weight distribution was more even. Furthermore, the fuel tank was also located centrally for balance. Despite these efforts, 60% of the weight still remained on the rear wheels.

What made the car unbalanced was its heavy engine and comparably small chassis and body. The design team engineered the largest possible engine within the 750 kg weight limit. This resulted in the largest capacity engine to compete during 1936 and 1937.

The chosen displacement was was six litres that was supercharged to achieve 550 bhp. A roots supercharger was attached to increase boost pressures up to 10 psi.

The high power to weight ratio, uneven weight distribution and Porsche swing-axle suspension system made the Type C over steer. Drivers of the car had a hard time predicting slip velocity and the forward driving position made it worse. Only a couple drivers were able to take the Type-C to its full potential.

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1936 Auto Union AG Auto Union C 6.0 V16   MON GER SUI ITA      
Nazi Germany Bernd Rosemeyer Ret 1 1 1      
Nazi Germany Hans Stuck 3 2 3 Ret      
Kingdom of Italy Achille Varzi 2   2 Ret      
Nazi Germany Ernst von Delius DNS 6   3      
Nazi Germany Rudolf Hasse   4 5 DNS      
1937 Auto Union AG Auto Union C 6.0 V16   BEL GER MON SUI ITA    
Nazi Germany Hans Stuck 2 Ret 4 4 9    
Nazi Germany Rudolf Hasse 1 5 Ret        
Nazi Germany Hermann Paul Müller Ret Ret     5    
Nazi Germany Bernd Rosemeyer   3 Ret Ret 3    
Kingdom of Italy Luigi Fagioli   DNS   7      
Nazi Germany Ernst von Delius   Ret          
Kingdom of Italy Tazio Nuvolari       5      
Kingdom of Italy Achille Varzi         6    
type Racing Car
built at Zwickau, Germany
engineers Ferdinand Porsche
engine 45° V16
position Mid Longitudinal
aspiration Roots Supercharger
valvetrain SOHC 2 Valves / Cyl
displacement 6005 cc / 366.45 in³
bore 75 mm / 2.95 in
stroke 85 mm / 3.35 in
compression 9.2:1
power 387.8 kw / 520.0 bhp @ 5000 rpm
specific output 86.59 bhp per litre
bhp/weight 708.45 bhp per tonne
body / frame Aluminum over Steel-Tube Frame
driven wheels RWD w/ZF differential
front tires 5.25×17
rear tires 7×19
front brakes Lockheed Drums
rear brakes Lockheed Drums
steering Worm and Rocker Shaft
f suspension Trailing Links w/Torsion Bars, Friction Dampers
r suspension Swing Axle w/Torsion Bars, Friction Dampers
curb weight 734 kg / 1618 lbs
weight distro 40 % / 60 %
wheelbase 2908 mm / 114.5 in
front track 1372 mm / 54.0 in
rear track 1372 mm / 54.0 in
height 889 mm / 35.0 in
transmission 4-Speed Manual
gear ratios 2.000:1, 1.292:1, 1.078:1, 0.965:1, 0.863:1
top speed ~313.8 kph / 195.0 mph
key drivers Bernd Rosemeyer
race victories 1936 Tripoli GP, 1936 Eifelrennen, 1936 German GP (Nurburgring), 1936 Coppa Acerbo, 1936 Swiss GP (Bremgarten), Italian GP (Monza), 1937 Grosvenor GP, 1937 Eifelrennen, 1937 Vanderbilt Cup, 1937 Coppa Acerbo

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