The A4 Sedan has the best drag coefficient in its class at 0.23. The new models also have impressively low CO2 emissions of 95 grams per kilometer (152.9 grams per mile) for the A4 Sedan 2.0 TDI ultra with 110 kW (150 hp); the A4 Avant 2.0 TDI ultra emits 99 grams CO2 per km (159.3 g/mi). The 2.0 TFSI with 140 kW (190 hp) emits 109 g/km (175.4 g/mi) in the A4 Sedan ultra and 114 g/km (183.5 g/mi) in the A 4 Avant ultra. The most powerful engines are two TDI six-cylinder units with up to 200 kW (272 hp). Driver assistance systems and infotainment are of luxury quality. A new generation of four-cylinder TFSI engines with newly developed combustion methods sets benchmarks in terms of fuel consumption, emissions and performance for four-cylinder gasoline engines. The A4 Sedan and the A4 Avant will be launched this fall. At 4.73 meters (15.5 ft) long and with a wheelbase of 2.82 meters (9.3 ft) - the new Audi A4 and A4 Avant have a confident stance on the road. A prominent horizontal line on the front and rear emphasizes the car's width. The flowing design with concise lines communicates the sporty elegance of the brand..