Audi RS6 Avant

Intro Audi endows the RS6 Avant Performance with a twin-turbocharged 4.0-liter V-8, which generates 621 horsepower and 627 pound-feet of torque. The powerplant combines with a 48-volt hybrid system that's found on other Audi products, such as the A8 luxury sedan and the Q8 crossover.