In 1983, Lancia claimed the World Rally Manufacturer’ Championship with the infamous two-wheel drive Lancia Rally ‘037’, beating the four-wheel drive Audi Quattro. Lancia Delta S4 Stradale: Group B’s Dual-Powered Street Monster The Lancia Delta S4 Stradale, built to homologate Lancia’s Group B rally car, is one of the most radical road-legal cars of the 1980s.Lancia Delta S4 Corsa Group B. The Lancia Delta S4 was a wild, purpose-built Group B rally car. With an extreme mid-engine layout, a supercharged AND turbocharged engine for insane power, and a lightweight composite body, the Delta S4 was both ferocious and technologically groundbreaking.The Lancia Delta S4 Corsa Group B In its full-fat Martini-liveried Group B guise, it took fearless and charismatic drivers such as Henri Toivonen and Markku Alén to another dimension of performance.