Generally, when we talk hybrids, we're talking about a car that either powers itself on batteries at low speeds, only firing up the internal combustion engine when a little extra giddy-up is needed, or an electric car that turns the gas-powered piston pusher inside into a glorified power plant. Audi's e-tron quattro is a little different, though. The R18 sports a four-wheel drive system that powers one axle with an elect
