In general, when we talk of hybrids, we are talking about battery power the car either alone at low speeds, only igniting internal combustion engine when extra cars giddy-up as needed, or electric shock are gas piston driving change in the power plant glorified. E-Tron Audi Quattro is a little different, however. The R18 sports a traction system to all four wheels which operates a hub in an electric motor, while others get the juice from the 510 hp V6. E-Tron Quattro also has a brother, the Audi R18 Ultra, which seeks to offset the additional weight of the hybrid powertrain using a lightweight material such as carbon fiber, if possible – including the gearbox. Both cars make their debut at the 24 Hours of Le Mans on June 16. For more details see the PR after the break.