Remember when 100 horsepower per liter of displacement was a huge feat of automotive engineering? That sort of power density was the preserve of high-strung motorsports powerplants and a handful of street engines not long ago. Well, today Mercedes has introduced its 2014 CLA45 AMG, and it cranks out an astounding 355 horsepower and 332 pound-feet of torque from just 2.0 liters. That's 178 horses per liter on pump gas in the high-performance version of Mercedes' entry-level model here in the Stat
Mercedes-Benz CLA-Class Videos
Mercedes-Benz made news in December when we learned that Kate Upton, the Sports Illustrated swimsuit edition cover model, would be pitching the automaker's all-new 2014 CLA at the Super Bowl next month. With Mercedes determined to target a more youthful buyer for its stylish compact sedan, choosing a beautiful 20-year-old pinup seemed to make good sense.