Introduced in the year 1982, Group B rally was the set of regulations for competition vehicles in sports car racing and rallying regulated by the Fédération Internationale de l’Automobile (FIA, English: International Automobile Federation). Commonly regarded as the golden era of rallying, some of the best rally cars ever built was all during the Group B era. However the era of Group B rallying was somehow short lived as some series of accidents led to the decision by FIA to cancel the class and replaced it with Group A. But although short lived, among rally fans Group B attained a legendary status.
The two wheel drive 037 was beaten by the Audi Sport Quattro and the mid-engined Peugeot 205 T16. In order to outperform the already established Group B rivals, Lancia needed a strong and amazing product thus the Lancia Delta S4 was born. The mid-engine turbo charged and supercharged S4 appeared to have all the goodness required to beat its Group B rally rivals but needed some more work in order to truly make a mark for itself.
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Along with Markku Alen and Girogio Pianta (veteran racer & team manager ) the Lancia rally team started testing the Delta S4 rally car prototype on the Italian roads. The motive of the tests were to perfect the power delivery and handling along with inspecting the robustness and reliability of the Delta S4.
When the car made its WRC debut at the Lombard RAC Rally (1985 Season finale), it performed tremendously well. In this video, you can see the teams working on the Lancia Delta S4. Later, on the same car dominated the rallies all under the guidance of Henri Toivonen and Markku Alén (seen in the video).
Video source – YouTube