450-horsepower 2018 Audi RS4 Avant is a quattro powerhouse

In the mid-1990s, Audi first introduced an “RS” nomenclature vehicle. Developed together with Porsche, the 315-horsepower RS 2 Avant was a wagon-shaped ballistic missile with its five-pot turbo engine. As a follow-up five years later, Audi had to up the cylinder count to a V6 when it produced the RS4 Avant out of the B5 A4 generation.