10. Buick Regal GS
Despite Buick’s reputation for cushy luxury, the Regal GS (introduced in 2018) proved the brand could blend performance and sophistication. Its turbocharged 2.0-liter four-cylinder Ecotec delivered 310 horsepower and 295 lb-ft of torque—enough to sprint from 0-60 mph in about 5.1 seconds when equipped with the optional all-wheel drive.
A sport suspension with upgraded dampers, Brembo brakes, and a limited-slip differential ensured confident handling and braking, while the Regal’s near-luxury interior featured supple leather and an intuitive infotainment system. Though production ended in 2020, the Regal GS remains one of the quickest and most refined American four-cylinder performance sedans of its generation