A carry-over from 2007, the Impala is a four-door five-passenger family sedan offered in four different trim levels. The LS and LT feature a 3.5-liter V6 engine, with an optional 3.9-liter V6 that produces 233 horsepower as an option on the LT model. That same engine is standard equipment on the LTZ, with the SS featuring a 5.3-liter V8 engine that produces 303 horsepower and 323 ft-lb. of torque. All models are front-wheel-drive and come standard with a four-speed automatic transmission.