Here's your answer: "The XL1 has a coefficient of drag of 0.189" from the article. That's an enormous improvement on all other production cars. Which is why it

Here's your answer: "The XL1 has a coefficient of drag of 0.189" from the article. That's an enormous improvement on all other production cars. Which is why it uses " 8.3 horsepower to maintain [60 mph]— one-third that of a Jetta" Of course, they don't mention the frontal area, which is just as important and yet never referenced in these discussions.