@jawad
bike engine tend to be more responsive, with their light internals! and they have a lot of potential! plus cars have this limit becuase its also a law, to the auto manufacturers :), theyhave a certain limit to stay in.
a formula1 car revs upto around 19000 RPM :O, so bike engines tend to be light and thus respond fatser where as cars have to stay under a certain limit hop this helps