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Video - Audi’s CNG-compatible A4 Avant g-tron explained

Snapshot: This is Audi's second production model compatible with compressed natural gas (CNG).

Audi took the wraps off the all-new A4 (B9 generation) several months ago and now they are providing more technical details concerning the g-tron version which will be available exclusively on the Avant model. It’s programmed to go on sale in Europe towards the end of 2016 and it will be the company’s second production car after the A3 Sportback g-tron to run on compressed natural gas (CNG).

The conventionally-powered A4 is set to go on sale in India sometime next year, but at the moment there aren’t any details whether the g-tron version will be offered in our country as well although it should taking into account CNG-powered cars are increasing in popularity in India. That being said, it’s unlikely Audi will sell this model in our country since the aforementioned A3 Sportback g-tron is not available in India.

This new CNG-compatible model has a four-cylinder, 2.0-liter turbocharged gasoline engine that develops 170 bhp and 270 Nm. More importantly, the four cylindrical CNG tanks can last for more than 500 km when running exclusively on compressed natural gas. Once there’s less than 0.6 kg of CNG available, the car will automatically switch to gasoline mode which will increase the range by an additional 450 km.

In CNG operation, the Audi A4 Avant g-tron consumes less than 4 kg / 100 km and has CO2 emissions of less than 100 g/km. Interestingly, after refueling and whenever the temperatures are very low outside, the car will start on gasoline and then the system will automatically change to CNG. Both the gasoline and compressed natural gas filler necks are located under a single tank flap.

Audi mentions that compared to a conventionally-powered A4 Avant, the g-tron variant lacks the spare wheel well and comes with the battery mounted in the engine compartment rather than at the back. It will be able to run on Audi’s own e-gas which is best described as a synthetic methane produced from a combination of water, CO2 and electricity. When the A4 Avant g-tron will use e-gas, it’s going to be CO2 neutral in operation, so it won’t harm the environment. 

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