For a manual car the driver disengages the clutch and shifts the gear and re-engages the clutch. In a car with automatic transmission the gear is changed automatically using a torque convertor or a Continuous Variable Transmission (CVT) mechanism without the use of the clutch. But in the cars with AMT (Automatic Manual Transmission) the driver can select the gear as per the requirement. The application of the clutch and the shifting of the gear are done automatically through electronic controls.
There are a few cars fitted with AMT mechanism in the Indian market. The Maruti Suzuki India Limited has 2 models the hatchbacks Celerio and the Alto K10. The hatchback Celerio launched in 2014 is the first car to be fitted with an AMT gear box. The demand for the AMT Celerio is so high that there is a waiting period of few months for this car. The Maruti gets the AMT gear boxes from the Italian company the Magneti Marelli. As there is high demand for these gear boxes the company is planning to establish a production plant in India.
Out of the 12 variants of the Celerio the LXi AT, the VXi AT and the ZXi AT priced Rupees 4.4, 4.7 and 5 lakh respectively have AMT. The engine used for these are 998 cc, 67 bhp and 90 NM torque engines giving mileage of 23.1 kmpl. The car takes 13.3 sec for 0 to 100 kmph acceleration and the top speed is 140 kmph.
The 3600 mm long Celerio has a wheel base of 2425 mm and a ground clearance of 165 mm with a boot of 235 litres. The top variant has cabin features like an engine immobiliser, child lock and central locking facility, manual AC, fabric seats, partially folding rear seat, 1 air bag, tilt steering, rear defogger and wiper, electric body coloured ORVMs with blinkers and a 1 Din music system with Bluetooth for phone.
In the refreshed models of the Alto K10 launched in November 2014 there is a petrol AMT variant the Alto K10 VXi AT priced Rupees 3.95 lakh. The 998 cc, 67 bhp and 90 NM torque engine gives mileages of 20.07 kmpl. The car takes 12.3 sec for 0 to100 kmph acceleration and the top speed is 137 kmph. The features of the car include an engine immobiliser, central locking with key, child lock facility, power steering, internally operated ORVMs with blinkers and a 2 Din music system. The Alto K10 VXi AGS is 3545 mm long with a boot sized 177 litres.
The MSIL has plans to launch more cars with AMT. The Maruti Ertiga and the Wagon R Stingray are expected with AMT shortly.