Auto Union Type A
"Porsche had previously been employed by Austro Daimler and Mercedes-Benz for whom he designed the highly successful S-Type racing car. Almost a decade earlier Rosenberg had successfully raced a mid-engined car and he convinced Porsche to follow that route for their new Grand Prix racer. They felt there were several major benefits of this layout. Firstly there would be considerably more weight on the rear axle, which should improve traction. Another advantage was that a prop-shaft running through the driver’s compartment was no longer required. This meant that the driver could sit considerably lower in the car, lowering the centre of gravity and also the wind resistance.
The location of the engine was just the first of many unconventional design elements of the Porsche/Auto Union Grand Prix car. Even though Porsche was restricted to a maximum weight of 750 kg, he opted for a sixteen cylinder engine, keeping the mass down by using exotic alloys for the block and head. The cylinders were angled at 45 degrees, leaving just enough space for the intake manifold, which fed from the rear of the engine by a huge Rootes-Type Supercharger. Porsche opted for a simple and lightweight valvetrain consisting of a central camshaft, operating the valves to push-rods and rockers. In its first version, displacing just under 4.4 litres, the V16 engine produced 295 bhp at just 4500 rpm.”
Pic From HERE
Text from HERE