PHEVs are often regarded as a relatively recent addition to the motoring landscape, but in fact Audi built its first petrol-electric hybrid car more than 30 years ago. The Audi Duo experimental vehicle was created in 1989, and starred at the following year’s Geneva Motor Show. Based on the elegant 100 Avant, the Duo’s 2.3-litre, five-cylinder petrol engine sent 136PS to the front wheels. At the same time, a nickel-cadmium … Continue reading Audi 100 Avant quattro Duo inspires Audi’s new Plug-In Hybrids