The Audi RS7 Sportback's real ace card, though, is its twin-turbocharged 4.0-litre V8. Thanks to a BMW M5-imitating pair of turbochargers mounted neatly between the cylinder heads, an air-to-water intercooler and direct fuel injection, it’s capable of producing 552bhp and 516lb ft, obviously Audi Sport didn't plan on resting on its laurels and developed the RS6 and RS7 Performance models which both produce 596bhp.
More notably it makes use of a cylinder-on-demand system, which shuts down four cylinders when the engine’s not under much load. In this state it operates as a V4; this helps the RS7 to achieve a claimed economy of 28.8mpg, CO2 emissions of 229g/km and a potential range of 475 miles.
Considering that the two-tonne RS7 is capable of 0-62mph in just 3.9sec – and with the right options, a governed 189mph – its economy is remarkable. To put it in perspective, it’s faster from 0-62mph, cleaner and more efficient than alternatives like the BMW M6 Gran Coupé, Porsche Panamera Turbo and Mercedes-Benz CLS 63 AMG coupé.
Power is sent to all four wheels via an eight-speed automatic transmission, while stability systems (including torque vectoring and an electronically controlled clutch-type rear limited-slip differential) work to make the best of the power and traction on offer. The Audi also features electromechanical power steering, a powerful high-performance braking system and adaptive air suspension.