Should you buy the Subaru WRX or the big brother STI? Is 2015 Subaru WRX STI better than the regular WRX? The 2015 Subaru STI features a 2.5L boxer four producing 305 horsepower while the 2015 Subaru WRX has a more modern 2.0L producing 268 horsepower and peak torque at a low 2,000 RPM.
The Subaru WRX is also lighter and achieves better fuel economy rating, all the while almost identically as fast as the more expensive STI. The Subaru STI offers additional limited slip diffs, a driver controlled center differential, larger brakes, tighter performance steering, and a more rigid chassis. Which is best? watch this for you I find out.