Audi Duo
The original Audi Duo (styled duo) was created in 1989 and was first shown at the Frankfurt Motor Show, and was based on the Audi C3 100 Avant. It was a petrol engine/electric hybrid concept vehicle. It was powered 100-kilowatt (136 PS; 134 bhp) five-cylinder petrol engine that drove the front wheels, and a part-time electric motor that could be activated when the vehicle was stationary, developing 9-kilowatt (12 PS; 12 bhp) and drove the rear wheels. It used nickel-cadmium batteries.
Read more about this topic: Audi Hybrid Vehicles