While the current 2.0- and 2.5-liter MZR inline-fours—as well as the Mazdaspeed 3’s 2.3-liter turbo-four—continue on and remain unchanged for 2012, the big news is the addition of the new SKYACTIV-G 2.0-liter four. Available in both sedan and hatch, the SKYACTIV-G offers 155 hp at 6000 rpm and 148 lb-ft of torque at 4100 rpm, slight boosts over the MZR 2.0 (148 hp, 135 lb-ft).