Audi surprised us today, by introducing the A3 Sportsback G-Tron, an A3 powered by the CO2-neutral fuel Audi e-gas that is set to debut towards the end of this year. We certainly are in an era, during which carmakers fight over who will offer a sustainable hybrid vehicle, and Audi has certainly promised much with the e-tron series of concept cars. But this idea of alternative fuel is something totally different, as the idea of using CNG as a fuel is not new, with a variety of independent specialists offering plug-in systems for almost any car on the market now, and MB having produced a number of CNG powered B-Class, yet we are very excited to see Audi offering something similar.
The A3 G-Tron comes with the same lightweight technology, infotainment and driver assistance systems as any other A3, yet under the luggage compartment floor can be found two tanks, each holding 7kg of CNG at a maximum pressure of 200bar and weighting only 27kg. This new type of tank consists of an inner layer of gas-impermeable polyamide polymer, a second layer of carbon fiber-reinforced polymer (CFRP) for high-strength and a third layer of glass fiber reinforced polymer (GFRP) for protection against damage from the outside. The three layers are bonded together with a high-strength epoxy resin.
An electronic gas pressure regulator is used to reduce the pressure to around five to nine bar in two stages at the injector valves depending on the engine load. According to Audi, if the pressure in the tank drops below ten bar, the engine management system automatically switches over to gasoline operation. It has to be noted that the A3 G-Tron is fully bivalent, as its performance figures are identical in CNG and gasoline modes. The CNG range is about 400km with the gasoline providing another 900km.
Finally, the engine is based on the new 1.4 TFSI with the modifications being focused on the cylinder head, turbocharging, injection system, and the catalytic converter. Developing 81 kW (110 hp) and 200 Nm of torque, the Audi A3 Sportback g-tron has a top speed of 190 km/h (118.06 mph), with 0 to 100 km/h (0 – 62.14 mph) taking eleven seconds, while the average fuel consumption is less than 3.5 kilograms per 100 km of CNG or Audi e-gas.
Click more to see our photo gallery and Audi’s press release. You can also join our official thread (link) and discuss the A3 G-Tron with us!
Source: [Audi AG]
Posted in: Audi