The new Audi RS6 Avant impresses in many ways, beginning with twin-turbo 4.0 litre V8 that puts out 552 hp and 516 lb-ft of torque. In addition a top speed of 190 mph is boasted by the ability to do 0-60 in just 3.9 seconds, partly due to Audi making the new RS6 Avant approximately 100 kg lighter than its predecessor.