Are you sure it wont just have a version of the 3.0 Supercharged V6 engine from the S4?Seems a bit excessive for Audi to launch such a unique engine in such a low volume car - unless it plans to put it in other cars in its range - cant imagaine which though? RS3 perhaps?
Also, isnt £45,000 a bit overpriced? Thats more than £10,000 over the TT-S! The RS4 (with a 414bhp 4.2 V8) cost 'only' £49.999 at its launch just a couple of years ago.