Which is better for a manual transmission car, 6th gear or 5th gear? What's the difference? Do more gears consume more fuel?

The commonly used manual transmissions are divided into 5MT and 6MT according to the number of gears. The 5MT transmission has 5 forward gears and 1 reverse gear, and the 6MT transmission has 6 forward gears and 1 reverse gear. block. The greater the number of gears, the greater the number of gears in the transmission, and the higher the manufacturing cost of the transmission. However, at the same time, the greater the number of gears, the smoother the transmission will shift, and the corresponding fuel economy of the vehicle will be better. . The number of MT transmission gears affects the vehicle's fuel consumption and ride quality

For the transmission, its function is to change the engine's speed and transmission torque, so that the engine can work in a higher fuel consumption area as much as possible. The transmission's control of engine speed and transmission torque is mainly based on the transmission ratio. The more gears there are in the transmission, the smaller the difference in transmission ratio between each gear. This also means that the division of the transmission ratio is more accurate. The control of engine speed is also more refined. Therefore, the more gears there are, the easier it is for the engine speed to work in the optimal fuel consumption area, and the corresponding vehicle fuel consumption is also lower.

For models of the same level, if equipped with the same engine, in general, the 6MT transmission has a wider transmission ratio range, with a larger 1st gear ratio and a smaller 6th gear ratio. This also means that the 6MT transmission has stronger acceleration ability in 1st gear. When the vehicle starts, there will be a slight feeling of frustration and pushing. At the same time, when the vehicle is traveling at 120km/h at high speed, the engine speed corresponding to the 6MT transmission is also Lower. Taking the Hyundai Yuena 1.4L6MT and Reina 1.4L5MT as examples, the corresponding engine speed of the Yuena 6MT transmission at a high speed of 120km/h is about 3000rpm, while the corresponding engine speed of the Rena 1.4L5MT transmission at a speed of 120km/h is approximately 3500rpm.

Therefore, when the 6MT transmission is driving at high speed, the engine speed is lower, the corresponding engine noise and vibration are smaller, the vehicle ride comfort is stronger, and the corresponding fuel consumption of the vehicle is also lower. The number of MT transmission gears will also affect the driving feeling of the vehicle

As mentioned earlier, the more gears there are in the transmission, the smaller the transmission ratio difference between adjacent gears. When the car owner upshifts or downshifts, The engine speed fluctuates smaller. In order to ensure a good ride, car owners generally need to control the clutch when shifting gears. The more gears there are, the smaller the change in engine speed and the smaller the change in engine inertia, and the corresponding clutch control becomes easier. The smaller the number of gears, in order to ensure good shifting smoothness, car owners need to find the clutch semi-linkage point and control it accurately, which increases the difficulty of clutch control.

The greater the number of transmission gears, although it makes the vehicle easier to control, it also makes the vehicle's operability more complex. For manual transmission vehicles, we generally require frequent gear changes, and it is best not to skip gears. Therefore, the more gears there are, the more times the car owner has to switch gears. For example, when a car owner accelerates from 0 to 60km/h, the ordinary 5MT transmission only needs to move from 1st gear to 5th gear, while the 6MT transmission adds one gear. When car owners drive on urban roads, they often stop and go due to complex road conditions. As long as the speed changes, the 6MT transmission needs to switch gears (3, 4, and 5 gears are most frequently used). The main reason is that the various gears of the 6MT transmission The corresponding speed range is narrow, and with the 5MT transmission, for general urban driving conditions, you only need to switch to 3rd or 4th gear to get everything done.

Since the 6MT transmission shifts more frequently than the 5MT, it is not recommended for car owners who have difficulty choosing. The main reason is that under the same vehicle speed conditions, such as 40km/h, the 6MT transmission can shift gears. 3rd gear can also be shifted to 4th gear, while 5MT only needs to shift to 3rd gear. Sometimes, car owners need to ponder for a long time which gear the vehicle's 6MT transmission should switch to.

To sum up, the cost of 6MT transmission is higher than that of 5MT transmission. Due to one more gear, 6MT transmission also appears to be more advanced. At the same time, the fuel consumption of 6MT transmission vehicles is lower, and the vehicle ride quality is also better. It's better; but the 5MT transmission has better controllability, making the vehicle much easier to drive.