If you're shopping for a smaller luxury sedan that puts a premium on driving satisfaction, the BMW 3 Series remains the place to start. It's one of the world's best sports sedans.

For 2007, 3 Series sedans and wagons come with powerful new engines, a couple of new colors and some minor interior tweaks. The 3 Series is expanding for 2007 with the introduction of an all-new, two-door 3 Series coupe and an all-new 3 Series convertible. (The 2007 3 Series Coupe is evaluated in a separate review.)

The 2007 BMW 328i and BMW 335i accelerate more quickly, stop shorter and turn with more lateral grip than any of their predecessors. The current 3 Series sedans are the roomiest ever, with more standard and optional equipment and more sophisticated electronic controls. BMW's x-Drive all-wheel drive system is available on the 328i.

Yet what characterizes the current 3 Series sedans as much as anything is its high-technology. We presume the car-buying public expects the latest technology in BMW products, and the 3 Series delivers in spades. It's everywhere in this compact sedan, some of it first in class and some not previously applied in any BMW.

The 2007 BMW 3 Series cars offer Active Steering that actually turns the front wheels without driver intervention, not to mention 150-mile run-flat tires, turning Bi-Xenon headlights, and an optional i-Drive interface. It was the first car in its class to offer radar-managed active cruise control, and even the standard cruise control will automatically apply the brakes if you get too close to a car ahead.

None of this is necessarily a bad thing, but owners of older 3 Series models may wonder where their purist sports sedan went, or at what point all the gizmos start detracting from that sporting character. Rest assured, this remains a true sports sedan, but its sporting heart is a little more difficult to find under all the stuff.

Any 3 Series model still delivers a special mix of performance, practicality and European luxury in a compact package. This car defines sports sedan, and it's the benchmark every luxury car maker from Acura to Volvo aims at. The 3 Series embodies consistent product character and values, defining what has made BMW one of the most respected brands among car enthusiasts. Above all, the 3 Series is a driver's car: accelerating, turning and stopping with remarkable agility and balance, without seriously compromising comfort or common sense.

What's New for 2007: The sedans and wagons get new engines, and a corresponding change in nomenclature. The 325i is replaced by the 328i. The new models have a more powerful version of BMW's 3.0-liter inline six-cylinder, generating 230 horsepower and 200 pound-feet of torque, for an increase of 15 hp and 15 lb-ft over the previous models. The 2006 330i sedan is replaced by the 2007 BMW 335i, featuring BMW's new 3.0-liter twin-turbocharged inline-6 producing 300 horsepower and 300 pound-feet of torque. That's an increase of 45 hp and 80 lb-ft for the 2007 335i sedans and wagons.