8. All-Wheel Drive (AWD)
Subaru and Audi were instrumental in refining all-wheel drive (AWD) systems for everyday passenger cars. AWD technology distributes power to all four wheels, delivering superior traction and stability across diverse road and weather conditions. Originally a feature for rugged off-roaders, AWD has become essential in performance vehicles and family cars alike, providing drivers with confidence in rain, snow, and on challenging terrain. This innovation has truly broadened the appeal and capability of modern automobiles. Reference