The Nissan 350Z was extensively upgraded for 2006, and for 2007 Nissan turned its attention to the engine, which has been redesigned for substantially more power. This brought a styling bonus. Because the more powerful engine needed better breathing, the 2007 Nissan 350Z gets a new hood and front fascia that sucks in more air.

The new 3.5-liter V6 engine is used in all seven models of the 350Z. Something like 80 percent of the parts in the engine are new for 2007. On paper, the 2006 engine was rated 300 horsepower. For 2007 the output has been raised to 306 hp, but the increase is more than 6 hp because beginning in 2007 there's a more stringent industry standard for measuring horsepower, as determined by the Society of Automotive Engineers.

The Nissan 350Z is fast, fun, and pure sports car. It costs about 10 times as much as the original 240Z, which went for about $3500, but in today's dollars that's only twice as much (as calculated by the Consumer Price Index). But you get about 10 times the car, so you're still way ahead.

Improvements for 2006 included upsized alloy wheels, tighter rack-and-pinion steering, bigger brakes, better headlamps, and a higher quality sound system. For 2007, side-impact air bags are added as standard equipment to the Roadster, and two Coupe models get the Bluetooth Hands-Free Phone System with steering wheel-mounted controls.

When you consider components such as a carbon-fiber driveshaft and drive-by-wire throttle, as well as the convenience features that come standard, such as automatic temperature control and a premium stereo, the price of $27,900 for the Base Coupe is compelling. Of course, the other six models escalate in price, to $41,250 for a Grand Touring Roadster with optional five-speed automatic transmission. But they all come standard with that 306-hp engine and six-speed manual transmission.

The 350Z is a true-blue sports car with creature comforts. Its firm ride, abrupt throttle response, and awkward cup holders don't make it a great place to drink coffee and make phone calls on the way to work, but there's a lot of cargo space for a sports car, and it isn't awkward to climb in and out. The excellent optional five-speed automatic makes a civilized commuter car, while still making you happy during a weekend run down a racer road.

The Nissan 350Z delivers more than the promise of its powerful looks. It's a visceral sports car with serious performance that you can live with every day. The Roadster adds wind-in-your hair freedom.