AT vs AMT vs DCT in Cars: Full Forms, Meaning & Key Differences 2025

One of the most important decision when you decide to buy a new car is the transmission option. After all, this important component helps transfer power from the engine to the wheels in a predetermined fashion. In the world of automobiles, you get to see a variety of car transmissions which include manual as well as automatic transmissions. While manual transmissions were popular previously, people now preffer automatic ones. In metro cities, the automatic transmission option is a boon to drivers when stuck in traffic jams. In addition, you get to see several categories in an automatic transmission, including AMT, CVT, and DCT. Some of these are even expensive while some can be purchased at affordable prices.

To make it easier here is a compiled list of transmissions to help you in your new car buying journey.

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AT vs AMT vs DCT in Cars

Manual Transmission (MT)

In a Manual Transmission (MT), the user has to select gears manually by operating the clutch and gear stick. The basic job of MT is to control the speed and torque of the car in different driving conditions. In simple words, the manual gearbox works on the principle of gear ratio and this ratio is the number of turns the outside shaft makes to the number of turns made by the input shaft. The lower ratio provides more torque but less speed while the higher gear ratio gives high speed but less torque. Basically, different gear ratio numbers are referred to as speeds.

Automatic Transmission (AT)
 

An Automatic Transmission, abbreviated as AT is a self-shifting gearbox which operates without any clutch pedal. The automatic transmission does not require you to manually change gears as it automatically changes them when the car moves. In addition, there are different types of AT that are categorized into Automated Manual Transmission, Dual Clutch Transmission (DCT), and Continuously Variable Transmission (CVT). Continue reading to know more about these gearboxes.

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Automated Manual Transmission (AMT)
 

In the automobile market, the Automated Manual Transmission is perfect for those who are looking for better fuel efficiency and low car maintenance. However, not every time the gear shifts are smooth in this gearbox system as compared to other types of automatic transmissions. Currently, the AMT option can be found in the majority of cars including the Toyota Glanza, and Maruti Suzuki Celerio.

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Continuously Variable Transmission (CVT)

The CVT utilized a common type of AT gearbox until AMT gearboxes arrived. Continuously Variable Transmission comes with an infinite number of gears. This system uses pulleys and belts instead of gears. This leads to an infinite number of gear ratios which change depending on the throttle input and speed. Due to these gear ratios, the CVT gearbox provides a very smooth driving experience.

Dual Clutch Transmission (DCT)
 

The DCT is one of the most advanced types of transmission. As its name suggests, the transmission offers two sets of clutches wherein one clutch engages only on an odd number of gears while another one takes care of the even number of gears. This results in fast and better acceleration. As a result, the shifts are quick and seamless which also offers better acceleration. Nowadays, many automakers offer DCT in their car models including Kia Seltos, and Skoda Kushaq.

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