The 4.0-liter V6, used in all but the base front-drive model, is new for 2007. This single cam engine delivers only an incremental increase in horsepower and torque (it's now rated 255 horsepower and 265 pound-feet of torque). But the new engine is much, much smoother for 2007 and more pleasant to operate than the engine it replaces. Moreover, it's matched to a new six-speed automatic transmission, which improves performance in all respects. The gear ratios in the six-speed improve acceleration at low speed, yet reduce rpm at high speed, decreasing interior noise and improving highway fuel economy (up from 22 to 24 mpg on all wheel-drive models, according to the EPA).

With the new engine, the 2007 Pacifica feels more responsive than previous models, and its substantial curb weight is less obvious. The transmission shifts down a gear smoothly and quickly, making quick merges or left-turns across traffic a no-sweat proposition. Moreover, the Pacifica cruises quietly at high speed, with no indication that the V6 is working hard to keep up.

The all-wheel-drive system works transparently, and it helps the Pacifica sail through corners rain or shine with the secure feeling of a good sedan. Under normal conditions, the system sends all of the power to the front wheels. But it can transfer up to 90 percent of the power to the rear wheels whenever the front wheels lose grip, whether it's because the road is wet or because the driver has floored the accelerator.

We found the Pacifica AWD delivered confident handling in the dry weather of California's wine country, swooping into curves with the accelerator floored. It also made quick work of slush and snow during winter in the upper Midwest. All a driver has to do is keep a light, steady foot on the gas pedal. The all-wheel drive and its control system take care of the rest, sending power to the tires that are gripping best and keeping the Pacifica rolling forward through the muck.

We were impressed with the handling, particularly in Northern California, where the paving is excellent, the roads are twisty and interesting, and the traffic is relatively light. The steering is not race-car communicative or direct, but it's better than the steering in many minivans and SUVs. The thick steering wheel feels good in the hands, and the suspension is tuned just right for a family vehicle: supple enough for a smooth, compliant ride, yet firm enough to control excessive lean or wallow. The isolated front and rear subframes, the long wheelbase and wide stance all work toward a comfortable, stable ride, and they limit the amount of road jolting that vibrates up through the chassis and into the passenger cabin.

The four-wheel disc brakes are large enough to handle the Pacifica's substantial weight, delivering sure, fairly short stops. We gave them a workout, and they responded every time without fade or smell or any sign of distress. ABS is standard on all models, and it's now comes with Brake Assist. This electronic system can tell when the brakes are applied full force, and it keeps them on full force even if the driver lightens pressure on the pedal as events develop ahead.