Street cars require more than 600 horsepower to reach 200 mph. The Delta Wing, a 1,250-pound Le Mans prototype, can get there with just 300 horsepower-the same amount of power in high-end family sedans. The Nissan-sponsored racer debuted at France's 24 Hours of Le Mans this summer, competing against cars twice its weight. The Delta Wing didn't finish-six hours in, a Toyota hybrid knocked it off the track, into a wall, and out of the race-but it ran long enough to prove itself the most efficient racecar in history.
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