Not much has changed with the looks of the Nissan 350Z in recent years. But for 2007 there is one distinctive and telltale feature: a big hump in the hood. That was necessary to make room for the new engine, which has a taller cylinder block and longer connecting rods, among other things. The new engine gets more air without any changes to the grille opening, which contains horizontal bars. There are three new colors for 2007: Solar Orange, San Marino Blue and Carbon Silver. The Roadster gets an optional gray convertible top, for 2007, replacing the high-profile blue one; basic black remains standard.

The massive vertical bi-Xenon HID (high-intensity discharge) headlamps produce a white light, and the new LED (light emitting diode) taillights provide quicker response for the brake lights than filament bulbs.

The bulging fenders and fastback and short front and rear overhangs give the Coupe its aggressive stance. This taut body layout, coupled with weight savings gained from a carbon fiber-reinforced, plastic driveshaft and an aluminum hood (and on the Roadster, a plastic trunk lid), balance the Z well for responsive handling.

The Coupe's sleek shape helps the Z slice through the air with a minimum of drag: 0.29 Cd on the Grand Touring. The Roadster's cut-off backlight (rear windscreen) isn't nearly as slippery, attaining a drag coefficient of 0.34 Cd. Underbody airflow is managed well, with zero lift on the front, and zero lift on the rear of the Coupe Grand Touring thanks to new diffusers.