Four-wheel drive is a system whereby all four wheels receive power from the engine simultaneously. Originally the system was developed for off-road vehicles but has become increasingly more popular on passenger cars in Australia. All Wheel Drive is also a term used to described the same concept. The basic advantage of an AWD or 4WD car is the additional traction (grip) on slippery surfaces gained by having all four wheels doing the moving.
Four-wheel drive (4WD) | All Wheel Drive (AWD)
Four-wheel drive 4WD AWD