Automated Manual Transmission (AMT) 

In the 2014 Delhi Auto Expo, where more than 70 vehicles were launched, one that pundits hailed as the most important was Maruti Suzuki's Celerio, the first affordable mass segment gearless hatchback. Celerio comes with AMT (automate manual transmission) sourced from Magneti Marelli, component arm of Fiat. AMT is an electro-hydraulic mechanism for automating manual transmission, which derives from Formula 1.


It has a hydraulic system and an electronic system. The electronic transmission control unit helps in engaging and disengaging the clutch and gear through an electronic actuator. It also has a sports mode, which enables drivers to move to the manual shifting of gear to increase and decrease the gear ratios with plus and minus either through gear knob /joystick or the steering. In India, AMT is currently available in three cars — Celerio, Alto K10 and Tata Zest.

Pros: Superior fuel economy, acceleration and responsiveness when properly tuned.

Cons: Pricey; can be clumsy at low speeds and when parking.