Audi 100 C2 (1976–1984)

'The C2 Audi 100 was launched in 1976, with crisper styling and an unusual five-cylinder engine (the first gasoline 5 in the world — Mercedes-Benz had shown the way in 1974 with their three litre Diesel 5-cyl in the Mercedes-Benz C111). It was initially a 100 bhp (74 kW) engine offering "6-cylinder power and 4-cylinder economy", and later upgraded to 136 bhp (100 kW).'

Audi Quattro - Rally Legend

'The Audi Quattro is a famous and historically significant road and rally car produced by the German maker Audi. Notably, it was the first four-wheel drive grand tourer since the Jensen FF of 1966 ("Quattro" means "Four" in Italian).
It is considered one of the most significant rally cars of all time, and was one of the first to take advantage of the then-recently changed rules which allowed the use of all-wheel-drive in competition racing. Many critics doubted the viability of all-wheel drive racers, thinking them to be too heavy and complex, yet the Quattro was an instant success, winning a rally on its first outing. It won competition after competition for the next two years. To commemorate the original vehicle, all future Audi Quattros were badged with a lower case Q. The original car with the upper case Q is highly sought after as a collector's piece.
The Audi Quattro shared many components and the core of its body style with the Audi Coupé, which was a member of the Audi 80 (B2 model) range.' wiki
http://en.wikipedia.org/wiki/Audi_Quattro
http://www.audiclubna.org/
http://www.audiusa.com/audi/us/en2.html
http://www.quattroownersclub.com/