Is 4000 RPM Considered Aggressive Driving?

[LaAdalynn]

4000 RPM is not considered aggressive driving. For daily driving of family cars, the engine speed generally varies between 1500 and 3000 RPM, and should be lower at idle, around 800 to 1500 RPM. However, if you observe the car's tachometer, you'll notice it is divided into several zones: the white scale area indicates the safe RPM range, while the red scale marks the dangerous RPM range. Below is an introduction to engine speed: Introduction 1: The level of engine speed relates to the number of work cycles per unit time or the effective power output of the engine, meaning the engine's effective power varies with different speeds. Introduction 2: Therefore, when specifying the effective power of an engine, the corresponding speed must also be indicated.