Audi ≫ A3Audi A3 30 G-Tron Sportback (2021, Type 8Y, fourth generation) photosby Joshua ThompsonThe 2021 Audi A3 30 G-Tron Sportback has a 1.5L turbo engine that runs on compressed natural gas (CNG) or biomethane. ◄ PrevNext ►Credit: Audi 2021 Audi A3 30 G-Tron Sportback It has a 1.5L turbo I4 with 96kW (129hp) and 200Nm (148 lb-ft), 0-100km/h in 9.7, and a top speed of 211km/h (131mph). Tags:30a3audifourth generationg-tronsportbacktype 8y