Driving a car has consequences for the environment. However, In the new Audi G-tron models you drive distances with very low CO2 emissions. This is because these Audi models run on Bio-CNG. Bio-CNG (Biogas) is a 100% clean fuel made from waste and is therefore a sustainable alternative to fossil natural gas. Bio-CNG is currently the cleanest fuel available. And the most economical. By filling up with Biogas (Bio-CNG) you save considerably on your fuel costs. What's more, you don't have to sacrifice anything in terms of performance, space and comfort. 

THE AUDI A3 SPORTBACK G-TRON
The Audi A3 Sportback G-tron was Audi's first CNG car, introduced in 2013. It was the first Audi to combine CNG with gasoline. With this Sportback, you can still drive long trips comfortably but with lower CO2 emissions. Thanks to its bi-fuel design, the Audi A3 Sportback G-tron runs on both Bio-CNG and gasoline. It is powered by an efficient four-cylinder in-line TFSI, modified for the use of CNG. The Audi A3 G-tron has a 9-liter gasoline tank and two CNG tanks which together account for 17.3 kg of CNG.

THE AUDI A4 AVANT G-TRON
The A4 Avant G-tron is a sportive, efficient and economic car. drives sportily, efficiently and economically. The basis for the engine is the new 2.0 TFSI that works with a highly efficient combustion process developed by Audi. The turbocharged power source delivers 125 kW/170 hp. The maximum torque of 270 Nm is produced from 1,650 rpm.

THE AUDI A5 SPORTBACK G-TRON
In the Audi A5 Sportback G-tron sportiness, beautiful design, considerable range and lower CO₂ emissions all come together. Under the hood of this Audi, one can find a 125 kW/170 hp and 270 Nm strong 2.0 TFSI engine. This enables the Audi to drive approximately 500 kilometers on Bio-CNG, as well as an additional 450 kilometers on gasoline.