What is the engine RPM at a speed of 120km/h on the highway?

[LaMaya]

Different car brands have different RPMs. The RPM also varies depending on the gear. Under normal conditions, at a speed of 120km/h on a flat road, most vehicles' engine RPM should be between 2500 and 3000. Factors affecting engine RPM: The RPM of a car is determined by the engine, which is a machine capable of converting other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines, jet engines, electric motors, etc. To bring a stationary engine into operation, an external force must first be applied to rotate the engine crankshaft, causing the pistons to start moving up and down, allowing the intake of combustible mixture into the cylinders, and then proceeding to the subsequent working cycles. The system that provides this external force is the starting system. The engine RPM is related to the number of work cycles per unit time or the effective power output of the engine, meaning the effective power of the engine changes with different RPMs. Therefore, when specifying the effective power of an engine, the corresponding RPM must also be indicated.