Hey Gowtham,

The most popular and demanding courses for PG in mechanical engineering or specialization courses are:

• M.Tech in Applied Mechanics
• M.Tech in Engineering Analysis and Design
• M.Tech in Industrial Automation and Robotics
• M.Tech in Manufacturing and Precision Engineering
• M.Tech in Mechanical System Design
• M.Tech in Refrigeration and Air-Conditioning
• M.Tech in Thermal Turbo machines
• M.Tech in Turbo Machines
• M.Tech in CAD/CAM
• M.Tech in Automotive Engineering
• M.Tech in Engineering Mechanics
• M.Tech in Machine Design

And the best M.Tech colleges to do Automobile engineering are:

• Indian Institute of Technology Bombay
• Indian Institute of Technology Delhi
• College of Engineering, Pune
• Indian Institute of Technology Roorkee
• RV College of Engineering, Bangalore
• Chaitanya Bharathi Institute of Technology, Hyderabad
• Coimbatore Institute of Technology, Coimbatore
• Lovely Professional University, Jalandhar

Hope that helps

all the best