The Lancia Delta S4 is a high-performance rally car produced by the Italian manufacturer Lancia in the early 1980s. It was designed for the World Rally Championship and featured a unique combination of a turbocharged engine and a supercharger, allowing it to achieve impressive power and acceleration. The Delta S4 was known for its lightweight construction and advanced all-wheel-drive system, making it highly competitive in various rally events. Debuting in 1985, the Delta S4 quickly gained recognition for its success in rally competitions, including the Group B category. Its distinctive boxy design and iconic livery made it a favorite among fans. However, due to safety concerns surrounding Group B cars, the Delta S4's production was limited, and the category was eventually discontinued in 1986.