Volkswagen Group is a company which at times looks a bit top heavy. With so many different brands all wanting to offer the fastest and most luxurious versions of different types of vehicles, the company's biggest competition is frequently itself. This has literally been the case in motorsports at several points, but now it seems that Porsche and Bentley are both aiming for the title of fastest SUV. This seems to have started with Porsche's unveiling of a new Cayenne Turbo S in Detroit.
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