Question: what is the difference between 3 tier and 2 tier ac?
Answer: AC 2 tier means, there will be two berths on each side, making a total of 6 berths 4 berths in the bay and two on way side. Curtains will be in existence for privacy. AC 3 tier means there will be three berths on the two sides of the bay with two berths on the wayside, making a total of 8.