The 2011 Subaru Impreza is part of the model's third generation and comes in four-door sedan and five-door hatchback versions. The base 2.5i models are powered by a 2.5-liter flat-four engine producing 170 horsepower, while the sportier WRX and WRX STI trims feature turbocharged variants of the same engine delivering 265 hp and 305 hp, respectively. Every Impreza features Subaru's Symmetrical All-Wheel Drive system. A 5-speed manual transmission is standard with an optional 4-speed automatic for the 2.5i trims. All WRXs and the WRX STI come exclusively with a manual transmission. Notable features include stability and traction control, antilock brakes, front-side and side-curtain airbags, and an optional navigation system with a touchscreen interface. The Impreza offers reliability, practicality, and impressive performance in the WRX and STI derivatives.