GTC Speed is remarkable in that it returns positively the worst gas mileage I have ever observed in any car that didn't have a roll cage and parachute on the back. This, the high-performance version of the Continental GTC -- powered by a 6.0-liter, 12-cylinder engine producing 600 horsepower and 553 pound-feet of torque -- is a woeful and desolate killing field of hydrocarbons, the wailing wall of dead dinosaurs. In typical, around-town, stop-and-go driving, this exquisite British convertible gets about 5 to 7 miles per gallon, and during hard acceleration 3 mpg.
http://www.latimes.com/business/la-fi-neil24-2009apr24,0,3971056.column
