Technical Specifications
Specifications
Ignition: Twin magnetos. One-18mm plug per cylinder.
Lubrication: Dry sump lubrication.
Transmission: All-indirect gearbox at rear. 5 speed on A type, 4 speed on B and C types. ZF limited slip differential on C type. Multiplate clutch on all types.
Chassis: Tubular frame
Front suspension: Twin training links with bottom arms linked to transverse torsion bars, top arms linked to friction type shock absorbers.
Rear suspension: 1934 A type transverse leaf spring with swing axle and longitudinal torque arms 1935 B, C types transverse leaf spring replace by longitudinal torsion bars friction shock absorbers
Fuel capacity: 46 gal fuel tank mounted on frame between drivers' compartment and engine
Cooling: Radiator located in nose connected to engine in A type through frame tubes connected to engine in B, C type through separate water tubes ethylene glycol
Steering: Steering worm and rocker shaft to individual track rods 16 1/2 in. dia. steering wheel
Brakes: Lockheed.
Wheels: Wheelbase A type 9 ft 4 in B type 9 ft 5 1/2 in C type 9 ft 6 1/2 in
Wheels Tires Continental 5.25 x 17 front 6 1/2 or 7 by 19 or 22 (race dependant)
Weight: A type 16.6 cwt B, C type 16.2 cwt
Max speed: 172-195 mph, the speedrecord for a Auto Union is 273.5 mph

Engines
Year 1934 1935 1935 1936 1937 1938 1939  
  V-16 V-16 V-16 V-16 V-16 V-12 V-12 V-12
  45 deg 45 deg 45 deg 45 deg 45 deg 60 deg 60 deg 60 deg
Type Type A Type B Type B type C type C type D type D type E
Bore x Stroke 68x75mm 72.5x75mm 72.5x85mm 75x85mm 75x85mm 65x75mm   53x56
displacement 4360cc 4950cc 5610cc 6010cc 6010cc 3000cc 3000cc 1480cc
power 295 bhp @4500 rpm 370 bhp @4700 rpm   520 bhp @ 5000 rpm 520 bhp @ 5000 rpm 460 bhp @ 7000 rpm 460 bhp @ 7000 rpm 327 @ 8500
Compression Ratio 7.0:1 8.95:1   9.2:1 9.2:1     10:1
supercharger 9 psi 11 psi   14 psi 14 psi 17 psi 17 psi 28 psi


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