See here the potential savings you could make with the e-tron 55 quattro (Audi) against a comparable gasoline vehicle. The estimate takes into account an annual mileage of 20,000KM, a daily usage of 40 km and other economic factors including the vehicle’s efficiency, energy prices and incentive rebates available.
Here is the reduction in CO2 emissions you could achieve with an annual mileage of 20,000KM, a daily usage of 40 km and the e-tron 55 quattro (Audi) against a comparable gasoline vehicle. Note that this is an estimate of emissions related solely to vehicle usage.
Over the entire life cycle, including battery and vehicle production, transportation to the user, vehicle usage and end of life disposal, an electric vehicle powered by hydroelectricity over a 150,000 km distance emits 65% less greenhouse gas (GHG) than a gasoline vehicle.