What is the normal engine speed for a car?

[DeEleanor]

When starting the vehicle, the engine speed will reach around 1200-1500 RPM, as a lower speed may cause the engine to stall during startup. Once the engine reaches normal operating conditions, the speed will drop, typically settling around 800 RPM. During gear shifting, the engine speed is usually around 2000-2500 RPM. Below are some key points about car engine speed: 1. During a cold start, if the engine idle speed is below 800 RPM or above 1200 RPM, it indicates poor engine performance. 2. When the engine operates above 4000 RPM, the combustion time shortens, leading to incomplete fuel combustion and a significant increase in fuel consumption. If driving in fifth gear at this speed, the vehicle speed usually reaches around 150 km/h, which is considered a dangerous speed.