According to this on the Touareg, the TDI is slower than the VR6 model. I had the VR6 in my old '07 Q7 3.6 and looking back on it, it was a dog of an engine.
Originally Posted by Emission
The Cayenne Diesel is my choice over the gasoline-fed V6... if you can swing it. Much better fuel economy, and the oil-burner is quicker (you can't overlook the torque). Both are VW engines.
We likely won't see the next-gen X5 until spring.
However, Car and Driver got 6.9s 0-60 on their Touareg TDI (http://www.caranddriver.com/reviews/...i-test-reviews), which matches the X5d's time with 40 less hp. I would've expected the Cayenne to be even faster because it was lighter, but I guess not
2011 X5 xDrive 35d Red/Black: ZCW, ZPP, ZRC, ZTP, 300, 386, 496, 4AB, 6FL, Combox, LED Coronas. 04/11 Production