The 2.5l in 2006+ VW's is indeed a inline 5cyl, but it's unrelated to the old Quantum/Audi 5cyl.

The "VR6 -1" is called (amazingly enough), the VR5! It's out of production now.
Here's a sound clip of one: http://www.youtube.com/watch?v=7rSn1KCdlxw&feature=related