Unification is a wonderful thing. In terms of Infiniti's G37, it applies not only to the union of coupe, sedan and convertible models but also to the line's harmonious blending of performance and luxury. Last year's coupe became the first to wear the G37 badge, owing to its larger and more powerful 3.7-liter V6 engine; the sedan model, however, retained the G35 name, in keeping with its carry-over 3.5-liter V6. Now, with the 2009 sedan also gaining the larger engine and a convertible joining the stable, the lineup is unified under the G37 banner. Learn more about the 2009 Infiniti G37xS.