Competent engines power the 2008 Ford Super Duty line up of trucks. A 5.4-liter V8 gasoline engine delivers 300 horsepower and 365 lb.-ft. of torque. More displacement arrives via the 6.8-liter V10, with 362 horsepower and 457 lb.-ft. of torque. The newly-developed 6.4-liter diesel V8 employs sequential turbochargers for 350 horsepower and a staggering 650 lb.-ft. of twist. All 2008 Ford F-450 models are fitted with the diesel as standard. A six-speed manual and five-speed automatic transmission are available; the F-450 gets upgraded gearbox synchronizers. When properly equipped (with a fifth wheel), towing capacity rates over 24,000 pounds, while payload is greater than 6,000 lbs. In addition to the engine configurations, the Super Duty suspension has been thoroughly revised, the result of which is a much smoother ride.