CVT is called as the continuous variable transmission or single speed transmission or the shiftless transmission. There is a myth that the automatic transmission will help you save fuel, but that’s not the case. More shifts via gears will make the car to improve the speed by using the less fuel than the automatic transmission. The main advantage of the CVT transmission is that you will have the average fuel economy and also it is more efficient and powerful, at the end you will never feel a shift in the gearing system. The only disadvantage is that it can make the engine to drone during the heavy acceleration.
AMT is also called as the Automatic Manual Transmission also known as the gearless transmission. This type wont have clutches to control the speed transmissions. It is fully automatic. These types of cars contains gear box which changes the does not change the gear automatically, but it changes the gear without the detachment of the clutches. Compared to the CVT cars, AMT cars consume more fuel. That is the AMT transmission is the combination of both the manual transmission and the automatic transmission.