Audi R8 - 2011 - 1 Audi R 8 - 4.2 - 2011 - The Audi R8 was initially equipped with a 4.2 litre V8 engine . Specifically, it is an all- aluminium alloy 32-valve (four valves per cylinder) petrol engine , [ 3 ] utilising Fuel Stratified Injection (FSI), [