A New Breed of Supercar: The 261-MPG Volkswagen XL1: Across the Geneva Motor Show hall from Ferrari's new 950-hp flagship and Lamborghini's $3.9 million Veneno, Volkswagen unveiled an entirely new breed of supercar. It's called the XL1 and its headline figure isn't a sub-three-second 0-60 time or face-melting thrust, but a fuel economy rating of 261 mpg.