the STI is expected to use a turbocharged, 2.5-liter boxer four producing something like 300 to 305 horsepower and 290 pound-feet of torque. (Note: The standard WRX uses a new, Forester-derived 2.0-liter engine.) Expect the usual host of STI fitments, including a more performance-oriented suspension tune and upgraded brakes, but don't expect a five-door variant – like the WRX, the STI will be a sedan-only affair.
