restaurant car 
noun British
A dining car.Unlike most trains, there are no connecting corridors on the Palace on Wheels; if you're having a drink in the club carriage or dining in the restaurant car you must stay there until the next stop before returning to your compartment....
- Emma was a customer service assistant in the restaurant car of the train involved in the crash.
- Just before lunch, a dining car waiter came through the train with a food/drink cart and extolled his exceptional dining car meals in German, Hungarian and English - ‘Fabulous, authentic Hungarian cuisine in our restaurant car today.’