From Automotive News...
"Audi SUV's sourcing is a step away from Porsche, VW versions
Audi is determined to make the Q7 different from its siblings. The Q7 SUV will use the same platform and assembly plant as the Volkswagen Touareg and Porsche Cayenne, but only about 15 percent of the Q7's parts are shared with Porsche and Volkswagen."