What is the appropriate RPM for shifting gears in a manual car?

[SanSerenity]

Manual cars should shift gears between 1500 and 2500 RPM. The higher the engine RPM, the more work is done per unit of time, resulting in greater power. However, higher RPM also speeds up the entire cycle, causing fuel to be expelled before it has enough time to fully combust, which can increase fuel consumption. Manual transmission vehicles require the driver to manually move the gear lever to change the gear engagement positions inside the transmission, altering the gear ratio to achieve the desired speed. The gears in a manual transmission vehicle are as follows: 1. First gear is the starting gear, used for vehicle takeoff; 2. Second gear is the passing gear, used for navigating complex road conditions and handling challenging situations; 3. Third gear is the transition gear, used for low-speed driving in urban areas; 4. Fourth gear is the cruising gear, used for prolonged high-speed driving; 5. Fifth gear is the high-speed gear, used for long-distance highway driving.