never thought about XC90.
many of them were sold with the 3.2L, which is not very "quick" and drinks fuel like a pick up truck...if you can find a T6 model, those are the ones to get, but they are more money...usually when i search for these, 95% of the models available are the 3.2L dogs.
no no no this info is wrong if you are considering XC90s.
The very first XC90 were either 2.5 turbo inline 5 2.5T or the T6 (inline 6 turbo). Due to the sideways orientation of the I6 only a GM 4 speed would fit. These transmissions were horrible. Avoid first get T6 at all costs!
Volvo then added the Yamaha 4.4L V8. These were fine as long as the dry camshaft bearing was addressed.
Later models had the 2.5T (best) or the doggy 3.2L as Volvo put the long in tooth XC90 out to pasture in the final years. For my money I would hunt out a creampuff 2007 V8 R design.