Audi A4 Avant g-tron Test Drive, Interior, Exterior – Video

The A4 Avant g-tron is simultaneously sporty, efficient and extremely economical. The engine is based on the new 2.0 TFSI featuring an advanced, highly efficient combustion process developed by Audi. The turbocharged power plant produces 125 kW (170 hp). Maximum torque of 270 Nm (199.1 lb-ft) is available at approx. 1,650 rpm. The pistons and valves have been specially modified for gas operation and allow for an optimal compression ratio. An electronic controller reduces the high pressure of the compressed natural gas (CNG) flowing from the tank from as much as 200 bar to a working pressure of 5 to 10 bar in the engine. This pressure control function is performed dynamically and precisely in response to the power requested by the driver. The correct pressure is always present in the gas line and at the injector valves – low pressure for efficient driving in the lower speed range, and higher pressure for more power and torque.

In the New European Driving Cycle (NEDC), the Audi A4 Avant g-tron with S tronic uses just 3.8 kilograms of CNG per 100 kilometers (8.4 lb per 62.1 mi) – that equates to fuel costs of only about four euros (as of: March 2017). CO2 emissions are about 100 grams per km (160.9 g/mi). In gasoline operation, the bi-fuel A4 Avant uses 5.4 liters per 100 kilometers (43.6 US mpg) and 124 grams of CO2 per kilometer (199.6 g/mi). The tank capacity of 19 kilograms (41.9 lb) of gas allows for a range of up to 500 kilometers (310.7 mi) in the NEDC. When the amount of gas remaining drops below approx. 0.6 kilograms (1.3 lb) – analogous to a residual pressure of 10 bar – the control unit switches to gasoline operation. The bi-fuel A4 Avant g-tron can cover up to 450 additional kilometers (279.6 mi) in this mode. The potential overall range is comparable to that of a car with a TDI engine. Nor does driving enjoyment draw the short straw. In conjunction with the manual six-speed transmission, the A4 Avant g-tron accelerates from a standstill to 100 km/h (62.1 mph) in just 8.5 seconds. Its top speed is 223 km/h (138.6 mph).