Sweptail by Rolls Royce

Before you get too excited about the price, keep in mind that this vehicle is no longer available on the market. That's because it was based on the recommendations of a single customer, the identity of whom the company has refused to reveal. Rolls Royce, a company known for its luxurious rollouts, only produced 4,000 cars in 2016!

This particular exclusive car features custom coachwork reminiscent of royal carriages from the past. Sweptail by Rolls Royce, which is most likely based on the Wraith, can only seat two people. According to the customer's specifications, the sunroof is fully panoramic, tapering down sharply like those on racing yachts.

The hidden attaché cases for holding laptops behind each door are a very cool feature of the interior handcrafted with wood and leather. There isn't much else to say about the world's most expensive car, except that it's based on models from the 1920s and 1930s and looks like a yacht from the back. The owner happens to be a superyacht and private plane collector.

Price: $13 million