More horsepower, more cogs, and more driven wheels.
Infiniti has replaced the G35, its BMW 3-series-fighting sedan, with the G37. As you'd imagine, the G37 uses the 3.7-liter V-6 from the sexy G37 coupe; in the sedan, it produces 2 hp less due to different exhaust routing. Still, at 328 hp, the new G37 four-door makes 22 hp more than did the G35's V-6, and its power output beats both the BMW 328i and the twin-turbo 335i. Infiniti's VHR (or very high rev) engine takes a page right out of BMW's book by using valve lift to do the job of a conventional throttle, and the resulting fuel economy dividend means that the extra horses are cost-free, at least at the pump: the 2009 G37 should receive the same EPA ratings as last year's G35.
Photo Gallery: 2009 Infiniti G37 - Infiniti Luxury Coupe and Sedan Review - Automobile Magazine