The Audi Quattro is a road and rally car, produced by the Audi brand. This model was shown at the Geneva Motor Show in 1980. Production of the original version continued until 1991. The word quattro is derived from the Italian word for "four." The name was also used by Audi to refer to the quattro four-wheel drive system, or a four-wheel drive version of an Audi model. The Audi Quattro was the first rally car to benefit from the rules which allowed the use of four-wheel drive. To commemorate the success of the original vehicle, all subsequent Audis with their trademark four-wheel drive system were badged "quattro" with a lowercase "q" and a distinct font that has remained virtually unchanged since its inception .
Source : Ben