What is the normal engine RPM at 120 km/h?
1 Answers
At 120 km/h, most vehicles' engine RPM ranges between 2500-3000. This specifically relates to engine displacement and the manufacturer's power tuning. The relationship between RPM and vehicle speed, along with influencing factors, are as follows: Relationship between RPM and vehicle speed: Generally, the higher the engine RPM, the higher the vehicle speed, showing a proportional relationship. The specific calculation formula is: Vehicle speed = RPM × Transmission ratio × Tire circumference. Influencing factors: Besides RPM affecting vehicle speed, the transmission ratio and tire circumference also influence it. Additionally, friction and air resistance are significant factors. It's noteworthy that once the engine reaches its rated power, increasing RPM won't raise the vehicle speed further, as the onboard computer will cut off fuel supply.