Audi A4 2.0 TFSI Quattro (220hp) B7

Good reliable power units, same applies with other variants though, service history and receipts for everything.
As with other variants in the B7 platform, everything chassis wise will be the same for the most part so wear and tear etc all apply across the board.
Engine-wise, its a good unit but make sure ist been looked after with lots of receipts for work done and services.
 
Personally i'd be looking at the TFSI still but that's just my personal preference. :icon thumright: