2011 Hyundai Sonata Turbo: Driven

Just a few years ago, the conventional wisdom with mid-size sedans was that, unless you counted yourself among frugally minded tightwads, you'd be much happier with the optional V-6 than with a standard four-cylinder engine. Then four-cylinder engines found a new benchmark for power last year, when Hyundai introduced its direct-injection 2.4-liter...