The most expensive car in the world is the rolls-royce la rose noire droptail. Touted as the costliest car ever made at a staggering rs. Rolls-royce la rose noire droptail serves as the british luxury car maker’s tribute to automobile craftsmanship. Fashion mogul ralph lauren owns one of the world’s rarest and most expensive cars. It is a 1938 bugatti type 57sc atlantic, one of only four ever made. It is a miracle that it survived over all these years, considering the tragic fate of its siblings. One of them was gone missing, and another was hit by a train.