Imagine you have around £100,000 to spend on an SUV and six friends to carry. The thing is, you're always in a massive hurry, so you absolutely must own the quickest car for the job. To answer this most first-world of problems, I pitch the diesel-powered Audi SQ7 - complete with magnificent 4.0-litre V8 - against the Tesla Model X 100D to find out which is fastest.
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