BUGATTI CHIRON. The Chiron may represent the absolute peak of performance of the internal-combustion engine, especially when you consider the astounding engineering feats that have gone into its construction. The Chiron has four turbos, ten radiators; it can achieve an electronically-limited top speed of 261 mph, and can consume its 26.4 gallon fuel tank in less than seven minutes. How to install: leave the folder in which it is located in the \ SteamLibrary \ steamapps \ common folder \ Car mechanic simulator 2018 \ cms2018_Data \ StreamingAssets \ Cars