Group B rally cars, now they were mental! Stupidly powerful motors in space frame chassis with bodywork that vaguely looked like the road going version.
Lancia Delta S4, a car so quick that it did 0 to 60 in 2.3 secs on gravel and during the Portuguese rally, Henri Toivonen was reported to have tested his Delta S4 at the Estoril circuit and to have set a fastest lap time that would have qualified him in sixth position at the 1986 Portuguese F1 Grand Prix!
Audi Quattro S1
Peugeot 205 T16
http://www.youtube.com/watch?v=rswT2gG4OII
Metro 6R4