What is the normal RPM when driving at 80 km/h?

1 Answers
DeJesse
07/30/25 10:12am
When the vehicle speed reaches 80 kilometers per hour, the engine RPM is typically around 1500-3000. The relationship between vehicle speed and RPM is explained below: Introduction to the relationship between vehicle speed and RPM: The relationship between vehicle speed and RPM is not a one-to-one correspondence; it mainly depends on the gear ratio of the transmission. For example, in a vehicle speed and RPM gear comparison chart, when the engine RPM is 2000, the speed difference between 4th gear and 5th gear can be quite significant. Introduction to gear ratio: When in the highest gear, the smaller the gear ratio, the lower the engine RPM will be at the same vehicle speed, resulting in better fuel efficiency. In this scenario, various frictional forces are relatively low, naturally leading to fuel savings. However, if the gear ratio is too small, the engine may struggle to perform. Therefore, it is essential to ensure that the engine's torque is sufficient to allow for a smaller gear ratio.
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