The BMW N63 engine was launched in a mid-sized luxury what?
BMW X6 The BMW X6 is a mid-size luxury crossover by German automaker BMW.
Audi RS 6 The Audi RS 6 quattro, commonly referred to as the RS6, is a mid-size sports-focused executive car, produced by the high-performance subsidiary company Audi Sport GmbH, for Audi AG, part of the Volkswagen Group.