a Volvo XC90 I've done a lot of research of the engines and still don't know! I've read the V8 is good but burns gas like crazy so that's ed off. The T6 I'm staying away from already, the 2.5T I heard is a small engine for a mid size SUV but by far the best one for it. I will be buying one for my daughter in high school, who will just be driving to school and back (10 minute drive). Also is there such thing as a V6 engine or is that the same as T6? I really need to know which engine!! She is working but I do not want the car to have problems that often.