Take to your favourite Rallycross circuit as 2 new cars make their way to DiRT Rally 2.0 today.   Lancia Delta S4 Rallycross The Lancia Delta S4 was one of the most ferocious cars to compete in Group B rally. When Group B was disbanded in 1986, many of the Delta S4s that had been in competition were quickly repurposed for Rallycross. Drivers like Matti Alamäki, heavily modified the car, optimising it for the sprint format that is synonymous with Rallycross.