Lancia dominated rallying in the 1970s with the legendary mid-engined Stratos. As the '80s moved along, Audi's all-wheel-drive cars became the ones to beat in the WRC, and Lancia answered with the all-wheel-drive Delta. The Group B Delta S4 rally cars shared nothing with their road-going versions outside of the bodywork, and even that was made of a carbon fiber composite with front and rear clips with a quick-change system for easy repair and replacement between stages. A 1.8-liter four used supercharging and turbocharging to compensate for lag at low RPMs, and all four wheels were driven through a system that allowed up to 70% of the power to go to the rear wheels. The Delta S4 only competed for two years before Group B was disbanded, but made its mark and influenced Lancia's rally efforts to come. The Delta S4 was one of the first to compete in the WRC, and won the 1985 RAC rally outright, making it a historical piece of Lancia's rallying history.