If I remember right the Q7 had little to do with the Touareg and Cayenne, but was going to be the basis of a now scrapped Bentley SUV.
I don't know where you came up with that one, as Automotive Engineer reported a long time ago..........
Thanks Russ.
Who was that by the way? To answer your question...
I came up with it from the depths of my dim and distant memory - I recall having read a article in Autocar magazine on a particularly nice Saturday morning about three years ago, sat in the car with a Massimo skinny wet latte, and a beautiful view.
Sadly I remember more about the day than the article, although having just Googled I came up with the very same article:
http://www.autocar.co.uk/News/NewsArticle/AllCars/214464/
I recalled that the article suggested that whilst it was a development of the Touareg/Cayenne platform, it was wider, longer with a different mechanical package. My memory wasn't too bad on this occasion.
I've not Googled it but if I remember reading somewhere that part of the justification in the Q7 business case was collaboration with Bentley (which would also need to be larger).
When I think it through, the concept of a Q7 is closer to the VW brand identity of VW than Audi. VW being more about practicality, and Audi more about style and sporting intent. A 7-seat SUV feels more practical, and less sporting than a 5-seat SUV.
A common enough way of bringing new models to the market, remember the Saab 9000, Lancia Thema, Fiat Chroma & Alfa 164? All based on the same platform too. Shared costs and all that.
Come off it, you'll be suggesting next that the VW Phaeton shares it's DNA with the Bentley Continental GTC.