The XC90 is an SUV, so not all that closely related to the V70, really. Apparently though its a really nice car. Doesn't compare to a VW Touareg or a Cayenne. But for safety it's top notch. Check out these links:
http://www.volvoxc90.com/home/
http://www.caranddriver.com/default....O&agModel=XC90
hope this answers your questions