While we will be the first to tell you the 2012 Buick Regal GS isn’t overwhelmingly fast, we still have to give kudos to its 2.0L turbocharged Ecotec four cylinder engine. The little engine goes on record as the most power-dense engine GM has ever built, producing 270 horsepower and a wholesome 295 pound-feet of torque. Because of this, Ward’s Auto has placed it on its annual “10 Best Engines List”. Others include Ford’s 5.0L “Coyote” V8 found in the Mustang GT, and the 3.0L supercharged TFSI V6 found in the Audi A6 and A7.
Source: Ward’s Auto