At one time the most expensive cars on the roads were synonymous with brands such as Ferrari, or if you wanted the romance of being James Bond, Aston Martin. When it comes to high-end hypercars and super-fast supercars, a few companies should come to mind first: Bugatti, Ferrari, Koenigsegg, Rimac, and Pagani, among others. These manufacturers have cemented themselves as the top dogs in the supercar and hypercar space, extending to their wealthiest clientele the fastest, rarest, prettiest – and in this case – most expensive cars on the planet. Although they remain appealing for many, those that are super rich are racing ahead to choose cars worth millions of dollars. What's the number one most expensive car in the world? Excluding classic cars sold at auction, the most expensive car in the world is the Rolls-Royce Boat Tail. Here are the Top 50 most expensive cars.