Now a household name, the Regal is a perfect example of Buick’s change in philosophy. This dynamic, youthful sedan offers a choice of naturally aspirated engines or a turbocharged 4-cylinder, with power ranging from 182 to 270 horsepower. Two 6-speed transmissions are available: a manual and an automatic. The factory-standard equipment has been upgraded for 2013 and now includes leather seats and dual-zone climate control.