The Chevrolet Cobalt LS and LT come with a standard 2.0L 150HP ECOTEC 4, an increase of only 2 HP from the previous generation. The higher end LTZ however adds 15HP, coming in at 165HP, still less then the current Sport model. And while Cobalt's lower trim levels may be holding the line on HP, the Cobalt SS makes a return to the lineup, with more power then ever. Truly a pocket rocket, the SS