Audi have injected even more power into the RS6 Avant, now with over 620 horsepower from its twin turbocharged V8. With increases of 29 hp and 37 lb-ft of torque, thanks to a rise in boost from 2.4 to 2.6 bar, the new RS6 Performance will now accelerate from 0-62 mph in 3.4 seconds. That time is 0.2 seconds quicker, and when optioned with the RS Dynamic Plus package the top speed is lifted up to 189 mph.