What is the maximum engine speed?

[LaAna]

The maximum speed of an engine is typically between 5000-6500 RPM. Racing cars can achieve astonishing maximum rated speeds of up to 12000 RPM or even higher. The maximum rated speed that an engine can reach is its highest rotational speed. On the engine tachometer, this is usually indicated by the start of the red zone, but it does not represent the absolute maximum speed the engine can achieve. The average speed for modern four-stroke engines at idle is between 600-800 RPM. An engine can only operate stably after reaching a certain speed, known as the idle speed. Below this speed, the engine will stall, while above it, the engine operates normally. Additionally, every engine has a defined maximum speed limit, which varies depending on the engine's structure. Increasing the rotational speed can enhance the engine's power output.