Which car speed is equal or below to 4000 revolutions?

There is no car that has a speed equal or below to 4000 revolutions. The engine speed of a car is measured in revolutions per minute (rpm), and most cars have engines that operate at speeds much higher than 4000 rpm. For example, the average car engine operates at speeds between 2000 and 4000 rpm, while high-performance cars can have engines that operate at speeds of up to 10,000 rpm or more.