Definitions for "All-wheel drive, awd"
Somewhat arbitrarily, we reserve the term "all-wheel drive" for systems that continuously provide propulsion to all four wheels. We use "4-wheel drive" to describe those more traditional systems that can be shifted into or out of this mode. Awd offerings include Audi's Quattro, Honda/Acura's SH-AWD, Mercedes-Benz's 4Matic and Volkswagen's 4Motion.