content: Burdened with lugging a rumored 20,000 lbs. worth of Beast around, the diesel engine isn't a rocket. Hitting 60 mph from a complete stop takes about 15 seconds, which is more than just about any new car we can think of, and the big car's top speed is said to max out at 60 mph. In addition, all that weight makes it a guzzler, sipping fuel at a rate of 8 mpg.  http://www.leftlanenews.com/the-beast-10-things-you-need-to-know-about-the-presidents-limo.html