Important and Popular Trains and Classes in Indian Railways

There are 8 different classes on Indian Railways, but not all of them are available on every train. For overnight journeys, most visitors choose AC2 (2nd class 2-tier air-conditioned, shown as '2A') or if they can afford it, AC1 (1st class air-conditioned, shown as '1A'), although more adventurous backpackers might choose sleeper class ('SL').  AC3 is also fine.  For daytime journeys, air-conditioned chair car ('CC') is a good choice where it's available.

Rajdhani Express trains are excellent extra-fast air-conditioned long-distance trains linking Delhi with regional capitals such as Bombay, Calcutta, etc. These are the best trains to take:  The Delhi to Bombay and Delhi to Calcutta Rajdhani Expresses leave in the early evening and arrive in the morning, so actually save time compared to flying. Meals are included in the fare, served at your seat.  The Delhi-Bombay Rajdhani uses brand-new German-designed coaches - see this link for photos. Highly recommended, they beat flying, hands-down..!

Shatabdi Express trains are excellent fast air-conditioned daytime trains running on routes such as Delhi - Agra and Delhi - Jaipur with air-con chair class and executive air-con chair class. Refreshments are included in the fare. Again, these are the best trains to take, highly recommended, Hotels in Mumbai.