The 2011 Jeep Liberty is part of the vehicle's second generation, a 4-door SUV with true off-road capabilities. Liberty comes in three trims: Sport, Limited and Renegade. Each is available in either rear- or four-wheel drive. The Liberty runs on a 3.7-liter V6 engine generating 210 horsepower with a 4-speed automatic transmission. Despite its muscular performance, it delivers an estimated fuel economy of just 15 mpg city / 21 mpg highway. The cabin is equipped with a safe and comfortable environment base models feature a 6-speaker sound system while higher trims offer a 9-speaker Infinity sound system. Jeep's brand reputation of producing off-road vehicles is reflected in the Liberty, with its strong towing capabilities and Command-Trac® or Selec-Trac® II 4WD systems.