From motortrends testing and 2011 TRUCK OF THE YEAR article. However, the heavy-duty market is fiercely competitive, and even though the Silverado HD's diesel horsepower and torque numbers initially beat those of the new Ford Super Duty -- at 390 horses and 735 pound-feet -- just after GM released its power numbers, Ford responded with a software upgrade that brought its Power Stroke's output to a nice, even 400 horsepower and 800 pound-feet. And Ford now has best-in-class towing capacity. On paper, that decision made it look as if the Ford would be crowned king of the segment. We could pack up our gear and go home, right? Wrong. Despite the horsepower and torque advantages the Power Stroke has over the Duramax, both Fords weighed significantly more than the Silverados (the diesel weighed nearly 800 pounds more). That helped put the weight-to-power ratio in the Chevys' favor in every case. It also explained why the diesel Silverado was fastest at the track to 60 mph (loaded with payload or unloaded) and had the best passing power. The gas-powered Ford was quicker to 60 mph and through the quarter mile with a 7000-pound trailer in tow, but the Chevrolets dominated otherwise. And the entire crew universally preferred the shifting smoothness of the Allison (diesel) and Hydra-Matic (gas) transmissions over the Fords' six-speeds. Also, despite the deceptively mushy feel of the brake pedal, the shortest stop from 60 mph in this test was the Silverado 3500HD.