Special video dedicated to the 30th anniversary of the extraordinary Lancia Delta S4, celebrated at the 2015 Rally Legend with a massive presence of 10 cars! It's incredible that so much time has passed since these cars, the group B final evolution, have plowed the land around the world. The S4 was unique, with combined supercharging and turbocharging, allowing the car to push with force already at 1.500 rpm. In its 1986 latest evolution the power was impressive, 650 hp and 2.5 bar of boost pressure. Enjoy its amazing sound!