• The Chevrolet Impala made its first appearance in 1958. In 1959 it became the top-selling car in Chevrolet's lineup. According to MSN Autos, Chevrolet sold one million Impalas in 1965. This was a record for a single brand. The Impala debuted again in 1994 as a variation of the Caprice Classic and became its own model in 2000. The 2011 version introduces a power front passenger seat and heated outside mirrors.
  
  

Engine Specifications

• The LS and LT trim levels come standard with a 3.5-liter V-6 engine. This engine generates 211 horsepower, 216 foot-lbs. of torque, two valves per cylinder, an overhead cam, 3.90 inches of bore and three inches of stroke, along with a 9.8 to one compression ratio. The LTZ comes standard with a 3.9-liter V-6 engine. This engine gets 230 horsepower, 235 foot-lbs. of torque, two valves per cylinder, an overhead cam, 3.90 inches of bore and 3.31 inches of stroke, as well as a compression ratio of 9.8 to one. A four-speed automatic overdrive transmission comes standard on all trims.
  
  

Fuel Economy

• The fuel tank on the 2011 Impala holds up to 17 gallons of gasoline. The 3.5-liter engine gets 19 miles per gallon in the city and 29 miles per gallon on the highway. The 3.9-liter engine gets 16 miles per gallon in the city and 24 miles per gallon on the highway.
  
  

Dimensions

• The 2011 Impala has four doors, and it stands 58.70 inches tall. It is 200.40 inches long and 72.90 inches wide, with a 110.50-inch wheelbase. The LS and LT trims weigh 3,555 lbs. each, while the LTZ weighs 3,649 lbs.
  
  

Passenger Room

• The Impala seats five people, with the option to seat one more in the LS or LT models. Front passengers get 39.40 inches of headroom, 42.30 inches of legroom, 58.70 inches of shoulder room and 56.40 inches of hip room. Rear passengers can expect 37.80 inches of headroom, 37.60 inches of legroom, 58.60 inches of shoulder room and 57.20 inches of hip room.