When you’ve reviewed over 600 cars, few new ones surprise you. With the polished road manners and granitic structure of a far more expensive car, the 2012 Ford Focus was one of the few. But its 160-horsepower engine, while easily adequate for daily driving, doesn’t provide the thrust many driving enthusiasts demand. For 2013, this should no longer be a problem. A 252-horsepower Ford Focus ST has joined the line.