The F-150 Exterior changes include a more upright and aggressive three-bar chrome grille. The nose also features two large “nostrils” beside the grille, a power domed hood and jeweled headlamps. There is a new, aero-friendly shape to the rear of the cab, while a lip on the top of the tailgate and front bumper shape also helps manage airflow, which improves fuel economy

Full-length laser welds on the frame replace traditional spot welds to increase rigidity;
The SuperCrew is six inches longer and features a flat rear floor and one touch folding rear seats that fold up out of the way to provide best-in-class in-cab cargo capacity behind the front seats;

Powertrain and Chassis
The ’09 F-150 offers three engines, all V-8s: a 320-horsepower 5.4-liter, a new-to-the-F-150 three-valve-per-cylinder 292-horsepower 4.6-liter, and a two-valve-per-cylinder 248-horsepower 4.6-liter. The first two come with a six-speed automatic that features both a very low first gear for strong acceleration and two overdrive gears for good highway fuel mileage. The 248-horse V-8 is mated to a four-speed automatic. Impressively, 4x2 F-150's with the 5.4-liter engine get the same 20 mpg highway mileage as the 4.6-liter three-valve engine.