Your making assumptions again. It is not that easy of a comparison.
A good way to explain this in simple terms for you is like this. New Audis come with a certain mileage from the factory because the factory test drives the cars to make sure that everything is correct. Typically any normal A/S/Q model comes with 11-13 miles as a R8 comes with between 50-60 miles. A V10 R8 is getting close to that low end Bentley price tag new. I can’t tell you how many hours are spent looking the car over for quality control but it isn’t a simple ten times the normal amount for a basic Audi. Plus I have seen my fair share of Bentleys, Lamborghinis, and even a Bugatti with issues from the factory.
It was funny though, the Bugatti owner called to complain and the customer service person asked when is a good time to send someone out to fix it, really quick into the phone call.