A drivetrain that delivers power to all four wheels of a vehicle enhances traction on low-grip surfaces like snow and ice. This improved traction allows for more controlled acceleration, braking, and steering in challenging winter conditions, compared to two-wheel drive systems which power only two wheels. For example, a vehicle with this capability can often navigate snow-covered inclines or icy patches where a two-wheel drive vehicle might lose grip.
Enhanced mobility in adverse weather conditions is a significant benefit of distributing engine power to all four wheels. This capability has become increasingly important in regions with frequent snowfall or icy roads, offering drivers increased safety and confidence. Historically, such systems were primarily found in off-road vehicles. However, the technology has become more common in passenger cars and SUVs, reflecting a growing demand for improved all-weather performance.