With the help of two superchargers, this car's V8 engine can crank out over 1,000 horsepower when running on E85 ethanol. It has a top speed of 241 miles per hour and a removable roof, making it one of the fastest convertibles ever made. (The top can be stored in the car's nose.) The winning bidder will also get an invitation to tour the Koenigsegg factory in Ängelholm, Sweden.