i think diesels are becomming a thing of the future?
especially with more manufactures working with bio, and working on twin turbo engines I can see the diesel lumps giving the petrol a proper run for its money.
after all at the moment, some of the aren't that far behind the petrols, the Mk5 GT Sport TDI is a second slower than the ED30 (both before a remap)
and the new A4 3.0 TDI is quicker (acceleration) than the 3.2 petrol