Koenigsegg Regera - $1.9 million

Christian von Koenigsegg may be the most visionary privateer builder in the world today. His creations are deeply personal and undeniably ground-breaking innovations. The many of the most expensive cars in the world, the price of the changes to match the complexity each customer's demands. The Regera is built around a 5.0-liter twin-turbo V8 that pumps out 1,100 horsepower. The rest of the drivetrain is a brilliant departure from the norm: the Regera uses something called the Koenigsegg Direct Drive system, wherein a small, crank-mounted electric motor is connected to the engine with a hydraulic coupling and acts as a launch motor.

Then, each of the rear wheels is assigned its own electric motor the push out around 700 horsepower. Off the line, with the coupling open, the Regera is a purely electric drive. When the hydraulic coupling closes, the smaller electric motor fills out the bottom of the torque curve. Few innovations in the automobile have inspired as much envy as Koenigsegg's drive system, and that accounts for just a part of the exorbitant cost.

source by http://www.thedrive.com/new-cars/8382/top-10-most-expensive-cars-in-the-world-in-2017