The Chevrolet Impala has been around for many years, with the first generation sprouting as a 1958 model. After taking a couple of breaks here and there, Chevrolet’s full-size car is in its ninth generation and it’s beginning to show its age. Nine generations breeds a variety of engine options, but the current Impala model is powered by a choice of two engines: a 3.5L V6 engine producing 211hp and 214 lb-ft of torque and a 3.9L V6 engine delivering 224hp and 240 lb-ft of torque. Both engines are mated to a four-speed automatic transmission. The mid-level trim comes with Active Fuel Management which shuts off half of the engine’s cylinders in order to improve fuel efficiency. The Impala can now get 14-18mph city and 21-29mpg highway.
The winds of change are blowing at gale force in the NASCAR Nextel Cup Series. The imminent debut of the Chevrolet Impala SS "Car of Tomorrow" and the impending introduction of GM Racing’s all-new R07 small-block V-8 racing engine are signposts that point the way to a new direction in technology in America’s most popular racing series.
Impala SS is powered by the all-new 5.3L small-block V-8 with Active Fuel Management technology, which regulates between eight-cylinder and four-cylinder operation and provides up to 8 percent improved fuel economy in certain light-load driving conditions. The 5.3L small-block V-8 is rated at 303 horsepower (226 kW) and 323 lb.-ft. (438 Nm) of torque.