Redesigned for 2009, the Ford F-150 pickup truck has gained power and also features more interior passenger room for increased comfort. A 248 hp 4.6L V8 replaces the 202 hp V6 as the base engine and is connected to a four-speed automatic. A 292 hp 4.6L V8 and a 320 hp 5.4L V8 are available as well, and both are mated to Ford's six-speed automatic transmission. The 5.4L V8 can run on E85 ethanol-blended fuel. Rear-wheel drive and four-wheel drive are both available; however, the four-wheel drive cannot be left engaged on dry pavement. Ford F-150 standard features include ABS, traction control, roll stability control, front side airbags and curtain side airbags. The regular cab trim, which no longer has rear access doors, is considered the base model. The SuperCab extended cab features rear-hinged back doors that do not open independently of the front doors. The SuperCrew crew cab has four conventional doors. The F-150 achieves 14 mpg in the city and 19 mpg on the highway.