Why was rally Group B banned?
Almost immediately, the FISA banned Group B cars from competing in 1987. It was deemed that the human brain couldn’t keep up with the speed of the Group B cars, causing tunnel vision. The cars were mothballed for a while – but it wasn’t the end for them. By 1990, Group A cars exceeded the performance of the defunct Group B cars on many events, because although they had far less power they had better handling and traction. They were also much safer.