About 75% of the cost of a car is in its architectural underpinnings. The rest goes on giving it a distinctive body and cabin, while honing the brakes, steering and suspension.

By late afternoon it was so hot on board that all the cabin doors were open and everyone was out in the corridor or in the dining car.

The difference not only consist in the softness (or hardness) of the padding, but also in the size of the cabin or the number of seats in a car.