Audi A4 and A5 have G-Tron versions for CNG/gasoline combo image

Do not mistake them for the E-Torn versions, which are electrified – G stands for gas and gasoline. Motivation comes courtesy of 2.0-liter TFSI engine, which was previously previewed at the Wörthersee GTI gathering in May.

Back then Audi released a near-production prototype of the A5 Sportback in its new generation, packing the gasoline engine that is capable to run on compressed natural gas as well – now the version has transitioned to the real world, and can be ordered at dealerships at home in germany already. The 2.0-liter TFSI bivalent motor has 170 horsepower (125 kilowatts) and 199 pound-feet (270 Newton-meters) worth of punch, and can run on three types of fuel: Audi e-gas, conventional CNG (compressed natural gas), or gasoline. It’s the usual 2.0 TFSI but modified to use an “innovative combustion principle.” According to Audi, the premium models will use an average of 3.8 to 4.2 kilograms CNG per 62 miles (100 kilometers) with corresponding CO2 emissions of 102 to 114 grams per kilometer.

Audi A5 Sportback g-tron

The Ingolstadt-based automaker is offering next to the liftback A5 the A4 Avant G-Tron as well – using the exact same motor. Fuel economy is also about the same at 3.8-4.4 kg/62 miles (kg/100 km) and 0-62 miles per hour (0-100 kilometers per hour) acceleration will be delivered in 8.5 seconds. Even on CNG, the premium wagon can still take you places at a maximum speed of 139 mph (223 kph). The carmaker estimates the A5 Sportback G-Tron and A4 Avant G-Tron are good for a range of up to 310 miles (500 kilometers) on CNG in the NEDC cycle. The tank, constructed out of carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP) will be doubled by the gasoline one, which enhances range with another 280 miles (450 km). In Germany they cost from €40,800 for the A5 Sportback and €40,300 for the A4 Avant.