Volkswagen's XL1: A Tech Breakthrough in Auto Design
This electric motor, which is powered by lithium-ion batteries and features a sleek design, claims to get 261 miles-per-gallon. The XL1 has a drag coefficient around 0.18. Compare that with the latest Toyota Prius, which features a drag coefficient 0.25. Drag coefficient refers to a ratio of resistance measuring an object in movement.