My wife's 2011 Audi Q5 3.2 has been nothing but trouble lately, with a persistent water leak into the passenger cabin that hasn't been fixed after 3 trips into the shop for repairs, loaner cars, lost time behind the wheel and several weeks of back and forth with Audi Customer Care. We are tired of this nonsense and, coupled with how much she's enjoyed my S60, are thinking about switching to an XC60. The question is now, 3.2 or T6 engine. She's been used to 270 hp and we aren't sure if the 240 or 300 hp option would be better. Has anyone been able to compare the engines while cross-shopping? What's the fuel efficiency like in real world driving for each?