Buick's 2014 LaCrosse is intended to bring younger buyers to what has traditionally been seen as a nameplate for more senior folks. Conservatively handsome, well equipped, capable, quiet, comfortable, and refined, the car boasts eAssist, GM's mild-hybrid system. A 304-hp V6 engine is available, and offers the option of all-wheel drive. But we actually prefer the progressive spirit of the eAssist powertrain, with its 2.4-liter 4-cylinder engine, small electric "boost" motor and regenerative braking. In a rare win-win, the system improves both fuel economy and performance, and combines with the car's solid look and feel to create a thoroughly credible alternative to the established imports. Although powertrains and chassis are unchanged, the LaCrosse rolls into 2014 with new front and rear fascias and upgraded interiors.