Quote:
Originally Posted by chernaudi
Also, most S4 engines are production based, and Audi has no mass-produced aluminum block, oversquare inline fours, unless they want to develop on from scratch.
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Independent of which configuration Audi chooses, the engine will always be a purpose built race engine. In fact, Audi can just use half of the Bentley 4.0 V8 TFSI.