Audi's crack at the SUV-that-thinks-it's-a-supercar segment. It already makes the more understated, and talented triple-turbo V8 diesel SQ7 and SQ8, but this is a full-house RS model, so gets the same lunatic 4.0-litre twin-turbo V8 petrol engine as the RS6 estate, producing 592bhp and 590lb ft of torque. That means 0-62mph in 3.8 seconds, 0-124mph in 13.7 seconds
