The 2008 Chevy Impala is a 4-door, up to 6-passenger family sedan, or sports sedan, available in 5 trims, ranging from the LS to the SS. Upon introduction, the LS is equipped with a standard 3.5-liter, V6, 211-horsepower, flexible fuel engine. The SS is equipped with a standard 5.3-liter, V8, 303-horsepower engine that achieves 16-mpg in the city and 24-mpg on the highway. A 4-speed automatic transmission with overdrive is standard on both trims.
