Automobile Engineering is a 4 years programme. The study course of this programme is related to Aerospace & Marine Engineering. 

In order to become a Automobile Engineer after 12th you need to apply for JEE entrance exam beside this you can apply state level exam & private colleges exam like KCET or Comed K.

Here are some of the colleges name you can prefer:

Manipal Institute of Technology

Dayananda Sagar College of Engineering (DSCE)

Acharya Institute of Technology

Good Luck!