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Best in snow: all-wheel drive or winter tires? .(tire buying tips)(Buyers Guide)

Consumer Reports

| December 01, 2002 | COPYRIGHT 2002 Consumers Union of the United States, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

Go-anywhere grip is a major part of America's love affair with sport-utility vehicles. Automakers are capitalizing on that passion for all-wheel drive by offering it on a growing number of sedans, wagons, and minivans. More than 20 non-SUV models now offer such systems, which provide power to all four wheels as needed. Indeed, sales of all-wheel-drive cars and minivans have roughly tripled since 1991, according to Ward's Auto World, an industry trade publication.

Most all-wheel-drive vehicles are based on front-drive cars, which, in turn, tend to do better in snow than rear-drive cars because the weight of the engine and transmission sits directly over their drive wheels. Front-drive models cost about $2,000 less, on average, than all-wheel-drive models, weigh less, and use less fuel. And as with other vehicles, you can improve their snow traction with winter tires, which use special compounds and aggressive tread (see "Tires for Winter and Year-Round," November, page 60).

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How much difference can winter tires make? We compared four of our test cars--the all-wheel-drive Volkswagen Passat GLX 4Motion and its front-wheel-drive sibling, the Passat GLS, and the all-wheel-drive Volvo Cross Country and similar front-drive Volvo S60.

The tests: We gauged traction by measuring the distance it took to accelerate from 5 mph to 20 mph over packed snow. Because cold-weather stops can be especially challenging, we also tested braking from 10 mph over smooth ice. We drove the all-wheel-drive cars with their factory-issue all-season tires, which should get these vehicles through most conditions. Front-drive models were tested two ways--with standard all-season tires and with winter tires. Our results:

* Best were the all-wheel-drive cars, which reached 20 mph 21 feet sooner, on average, than the front-drive cars equipped with winter tires.

* Winter tires yielded the biggest snow-traction gain for the buck, however. Using them helped the front-drive cars reach 20 mph nearly 28 feet sooner than they did with all-season tires. Cost: about $300 for the four winter tires plus another $160 or so for an extra set of wheel rims ...

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