Audi Q7 – Review: Luxury vehicles are sometimes a lesson in diminishing returns. Any car, be it an econobox or a Bugatti Veyron, can get you from A to B. Luxury cars are supposed to do it with an amount of flair, style, performance and sophistication that matches their price. The Audi Q7 has the panache factor, with a 4.2-liter V8 engine, lavish interior loaded with features, and styling with a definite punch, and it certainly has the luxury price: Our loaded test car came out to around $68,500. That’s where the diminishing returns come in. We recently drove an Acura MDX with a sticker price that was about $48,500, and during our time in the Q7 we couldn’t figure out why this Audi was supposed to be $20,000 better than the Acura.