What is the engine speed at 100 km/h?
1 Answers
At 100km/h, the transmission is usually in the highest gear, and maintaining this cruising speed does not require pressing the accelerator deeply. Generally speaking, a range of 1000 to 4000 RPM is considered normal. The conversion relationship between engine speed and vehicle speed is: Vehicle speed = Engine speed × Current gear ratio of the transmission × Wheel circumference. From this, it can be seen that engine speed and vehicle speed do not have a one-to-one correspondence; they also depend on the current gear, which is the gear ratio of the transmission. For example, at an engine speed of 2500 RPM, the corresponding vehicle speed will differ between second gear and fourth gear. Higher speed generally means higher RPM, but higher RPM does not necessarily mean higher speed. The RPM range of 2000 to 4000 is referred to as the engine's healthy RPM range, meaning that operating within this range allows the engine to perform its functions more effectively. If the RPM is too low, fuel combustion in the cylinders will be incomplete, leading to easy carbon buildup in the engine. Over time, this can cause significant damage to the engine. Conversely, if the RPM is too high, it will increase wear and tear on the engine.