Audi Q5 and BMW X3 have done really well in the compact sport utility vehicle (SUV) market. Both the SUVs have a 3lt. 6 cylinder engine but the Audi Q5 comes with a new MMI display and 8-Speed S-Tronic Autobox in its petrol variant. The re-tweaked diesel engine of the Q5 engine delivers 15% more efficiency. Here's the comparison between the recently arrived and facelifted 2013 Audi Q5 and 2013 BMW X3.