• Manufactured by the Ford Motor Company, the F-250 is part of the Super Duty line of F-series full-size trucks. In 2010, F-250 models were available in four trim levels -- XL, XLT, off-road Cabela and high-level Lariat -- and in regular cab, extended cab and crew cab passenger cabin styles. Engine options for 2011 F-250s are a 6.2-liter V8 and a 6.7-liter Power Stroke V8 turbodiesel.
  
  

Engine

• The 2011 F-250 model's two engine options have similar horsepower but drastically different torque-generating capability. The 6.7-liter Power Stroke V8 turbodiesel engine generates 390 horsepower at 2,800 rpm; it has combustion chamber displacement of 6,651cc, with bores of 3.9 inches and strokes of 4.25 inches. The engine's compression ratio is 16.2 to 1. The gasoline-powered 6.2-liter V8 produces 385 horsepower at 5,500 rpm. Its displacement is 6,210cc, its bore and stroke are 4.02 inches by 3.74 inches, and its compression ratio is 9.8 to 1.
  
  

Torque

• The 6.7-liter engine is capable of a maximum of 735 pound-feet of torque; the 6.2-liter has up to 405 pound-feet of torque.
  
  

Torque RPM Differences

• The 6.7-liter engine can generate its 735 pound-feet of torque working at rpm as low as 1,600 rpm. For the 6.2-liter engine to reach its maximum of 405 pound-feet of torque it must work at a rate of 4,500 rpm.