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. Mercedes-benz 300 slr gullwing uhlenhaut. In may 2022 a new record was set for the most expensive car ever sold, when a 1955 mercedes-benz 300 slr gullwing uhlenhaut was sold at auction for $142.