So What's the Bottom Line?
Four-wheel drive helps get cars going. When it comes time to brake or change direction on low-traction surfaces, the extra mass of the driveline becomes more of a detriment. Folks who live in hilly places that get snow may need the climbing capability of four-wheel drive. If it snows a lot in those hilly places, they should probably invest in winter tires, too. Even flat-landers who happen to have steep driveways may wish to consider a four-wheel-driver.

Almost everyone else will most likely be better served by using winter tires. Acceleration takes longer, but in an emergency, the handling behavior and improved lateral grip of two-wheel drive and winter tires -- in the slippery stuff -- are the safer bets.

Winter tires boosted the rwd Benz's acceleration times more than they did the fwd Audi's, but in almost every other test, the inherently front-heavy Audis derived more benefit from the winter rubber than did the more evenly balanced Benzes. This finding certainly suggests that front-drive cars benefit from winter tires as much or more than rear-drivers do.

And finally, unless snow or ice covers your roads many times in a winter, the snow benefits of winter tires may not outweigh their drawbacks on dry pavement.

There, Nevin. And don't ask which came first, the chicken or the egg.