Why the engine of the sport car is on back side?

Why the engine of the sport car is on back side?
Sports car's have powerful engines . So if the engine it attached to the front wheels then front wheel's would have to the acceleration as well as the steering which would spoil the handling especially during turning fast (the reason front engine car screech during turing fast).

Now putting the engine at the back and connecting it to the rear wheels , the rear wheels would do the job of accelerating , and the front wheels would be free to do the steering part .