
The Impreza 2.5i and Outback Sport use a 2.5-liter horizontally opposed four-cylinder engine that churns out 170 horsepower at 6000 rpm and 170 pound-feet of torque at 4400 rpm. Those numbers make the Impreza as powerful as just about anything in the class, though the four-cylinders from Nissan and Toyota feel more responsive.
Subaru says it has modified the engine's torque curve to improve low end response. We drove the 2.5i in the mountains of Colorado and found it to be up to the task, though it certainly had to work hard on steep grades. If we had to deal with those conditions on a regular basis, we'd prefer the added power of the WRX's turbocharged engine, which is more powerful and less affected by altitude.
Fuel economy is generally good. At an EPA-estimated 20 mpg City and 27 mpg Highway, the Impreza isn't nearly as fuel-efficient as the Honda Civic, which gets 24/36 with an automatic transmission, but it is slightly better than the AWD Toyota Matrix, which is EPA rated at 20/26 mpg.
The Impreza offers two versions of Subaru's Symmetrical All Wheel Drive system. Models with the manual transmission have a viscous coupling locking center differential that splits power 50/50 front to rear. Models with the automatic use an electronically managed continuously variable transfer clutch. Both versions of the system transfer power to the wheels with the best grip. Both also provide a measure of all-weather security that gives Subaru an advantage over other makes. That was proven in Colorado, where all-wheel drive gave the Impreza stable handling on snowy mountain roads.
The Impreza also has a handling advantage versus several competitors. The Impreza hosts the performance-oriented WRX and WRX STI models, and the base models benefit from the built-in handling prowess needed for the top models. In addition, Subaru's flat boxer engines can sit lower than other engines, allowing for a lower center of gravity and therefore better handling.
Get behind the wheel, and you find the Impreza's steering and handling are crisp, and there is little lean in corners. Still, with standard 16-inch wheels and soft suspension settings, the Impreza is not twitchy or harsh riding. The new double-wishbone independent rear suspension helps both handling and ride quality, and we never found the Impreza uncomfortable. These are enjoyable cars for people who like to drive.
The brakes provide worry-free stops and good pedal feel. They come standard with Electronic Brake-force Distribution, with apportions braking power to all four corners. We recommend buyers opt for the electronic stability control system, which is included in the Premium package and comes with Brake Assist.
