What is the appropriate RPM at 120 km/h on the highway?

[DiDaniela]

When the speed reaches 120 km/h, the RPM is generally around 3400. Here is some related information about RPM: 1. The role of RPM: The engine RPM 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 RPMs. Therefore, when specifying the engine's effective power, the corresponding RPM must also be indicated. The effective power and its corresponding RPM specified on the engine's product label are referred to as the rated power and rated RPM, respectively. The operating condition of the engine at rated power and rated RPM is called the rated condition. 2. Introduction to rated power: Rated power is not the maximum power the engine can produce; it is the maximum usable limit of effective power determined based on the engine's intended use. For the same engine model, the rated power value may differ depending on its application. Effective torque also varies with engine conditions. Therefore, the maximum torque a car engine can output and its corresponding RPM serve as one of the indicators for evaluating the engine's performance.