I have the I-6 and FWD only in my 2010 XC90. Plenty of power for me. I purchased it used. I called the Volvo dealer to check on service issues and the advisor tolm me that the 6 cylinder versions with FWD were bulletproof. He told me he would probably see me once a year for its annual maintenance.

I have a 2010 XC90 with the 3.2 I-6 and FWD only. My last trip on the Interstate to Tuscaloosa Alabama netted me 24.5 mpg at 70mph with the cruise on and the A/C on also. In town I average 19mpg. Not too bad for such a big vehicle.