The list dubbed "The Dirty Dozen" from American Council for an Energy-Efficient Economy begins with the most expensive car in the world -- the Bugatti Veyron.
For $1.6 million, you get an 8-liter, 16-cylinder engine that pumps out 1,001 horsepower, with a top speed of 265 mph. However, it only gets 8 mpg in the city, 15 on the highway. But if you can afford one, chances are you're not too worried about the constant trips to the gas station.
That's followed by five massive SUVs and pick-up trucks that get anywhere from 10-13 mpg in the city. Unlike the Bugatti, these are vehicles that are actually on the road, incurring the wrath of the ACEEE.
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Here is the full list:
Chevrolet Suburban/GMC Yukon
Dodge Ram Mega Cab
Chevrolet Express/GMC Savana
Mercedes-Benz ML 63 AMG
Mercedes-Benz G 550
Bentley Continental GTC
Ford Expedition/Lincoln Navigator
To read more, go to FutureCars.com