What is the RPM at 80 mph?
1 Answers
For Japanese cars driving normally at 80 mph, the engine RPM is around 2000. When idling, the engine RPM generally ranges between 700-1100 r/min. The engine RPM depends on the vehicle's displacement - larger displacement means greater torque and consequently lower RPM. The conversion relationship between engine RPM and vehicle speed is: Vehicle speed = Engine RPM × Current gear ratio of the transmission × Wheel circumference. This shows that engine RPM and vehicle speed don't have a direct correspondence, as it also depends on the current gear (transmission ratio). The engine truly demonstrates its advantages when RPM exceeds 2000. The RPM range between 2000 and 4000 is considered the engine's healthy operating zone, meaning the engine performs optimally within this RPM range.