Guarda Streamingcommunity. Even more from the full story behind the awesome Group B Rally cars, featuring mind-blowing contemporary and archive racing footage of these fire-breathing rocket ships at blistering speeds! Declared “too fast to race” at the end of the 1986 season, the Group B cars changed the face of rallying! The Lancia Delta S4 could accelerate from 0-100km/h in 2-3 seconds on a gravel road, and Nigel Mansell is reputed to have said that the Peugeot 205 T16 could out-accelerate his F1 car! All were built to reach at least 400bhp, so we pushed these super-charged beasts to their absolute limit to see what else they could do, with legendary ex-World Rally champion Stig Blomqvist behind the wheel!