There are various ways of making cars perform better. You could gain speed by utilising a jet engine, but that may be counterbalanced by the cost of installing and running it.
Aerodynamics becomes more significant as speed increases, but even then automotive designers have put enough lumps of plasticine in enough wind tunnels to have a pretty good idea of what is a good shape for a car aerodynamically speaking.(…)
via Novel fixing technique has potential beyond the automotive sector.