What is the suitable engine RPM for shifting gears in a manual transmission?
2 Answers
For a manual transmission, it is generally appropriate to shift gears when the engine RPM is between 1500 and 2500. High-revving engines exhibit a proportional relationship between torque and RPM within certain limits, so shifting at 3000 RPM may feel more powerful than shifting at 2000 RPM. Except for first gear, other gears can be shifted between 3000 and 4000 RPM. However, during actual driving, it is not advisable to frequently look down at the tachometer for extended periods. When shifting gears, you should simultaneously press the clutch and release the accelerator. The moment the power is cut, the engine RPM will start to drop. Releasing the accelerator too early may cause the RPM to drop first, leading to engine braking and a jerky sensation, as if suddenly hitting the brakes. On the other hand, releasing the accelerator too late after the clutch is disengaged will cause the engine RPM to rise unnecessarily since the engine is no longer under load.
I've been driving manual for ten years, and the timing of gear shifts depends on the actual situation. For daily driving on flat roads, shifting between 1800 and 2500 RPM in a regular sedan is the most comfortable, providing sufficient power without wasting fuel. If you're driving a small-displacement car uphill or with a full load, it's best to rev above 2500 RPM before shifting, otherwise, you might experience lugging. When downshifting to overtake, I usually rev above 3000 RPM for instant power. Remember, never develop the bad habit of staring at the tachometer—focus more on feeling the car's vibrations and changes in engine sound. When the 'humming' sound deepens, it's time to upshift. Over time, your muscles will develop a memory for it.
