If you have factory load bars, and are wanting to carry the bikes up top, it is actually quite simple: Thule has 4 models that are designed to fit aero profile, factory cross bars, round or square bars. The Thule Sidearm will mount the bike if you like to keep both wheels on (not my style), Sprint, Sprint T-Track and Paceline require removing the front wheel. They have a bunch of other models that are designed to match Thule brand rack systems and are for one specific bar profile, but the four I mentioned are a departure for Thule in that they will mount to any style crossbar.
Knowing that, pricing is pretty straight forward. Since that post, I've been doing some more homework in preparation for my purchase. Right now, I am waiting on an annual sale at a co-op outdoor store I am a member of, as that sale price, plus a rebate that can be applied towards the purchase, will net me a price my Volvo dealer can't touch.
My question was more about if Thule did or did not make the racks for Volvo. I've only been a Volvo owner for about seven years now, but I've been riding bikes a lot longer than that. As a result, I know a lot more about bicycles and bicycling than I do about Volvo . . . other than I really like my Volvo