I tried both X3 and Q5 2,0diesel engines both with automatic transmission. Wow what a difference. In the Q5 you sat waiting for the gear to change and the X3 transmission felt very modern and quick in response. I'll think you need the 3,0 diesel for the Q5 with auto transmission to have fun but it was already fun with the 2,0 d in the X3. If you are comparing the two diesel engines with auto transmission...
I really gave the Q5 a chance cause I do like the looks of it but the X3 was a better built car. I had a look at the mercedes and walked away when I opened the door
