Audi will quickly expand the range of engines for the A3 Sportback. It includes a dynamic S model and additional high-efficiency, low-emissions variants. Set to debut in 2013 is an 81-kW (110-hp) TCNG engine for operation with Audi e-gas, a fuel that Audi produces itself in sustainable manner. In the holistic well-to-wheel analysis, the CO2 emissions of the A3 Sportback TCNG are below 30 g/km (48.28 g/mile). The A3 Sportback e-tron with a powerful plug-in hybrid drive will follow in 2014.