Audi RS 3 Sedan:

Combined fuel consumption in l/100 km: 8.4 - 8.3** (28.0 - 28.3 US mpg);
Combined CO2 emissions in g/km: 191 - 188** (307.4 - 302.6 g/mi)

Audi RS 3 Sportback:

Combined fuel consumption in l/100 km: 8.4 - 8.3** (28.0 - 28.3 US mpg);
Combined CO2 emissions in g/km: 192 - 189** (309.0 - 304.2 g/mi)

** Figures depend on the tire/wheel combination used