Audi RS6 Avant: 4.0-liter biturbo V8 engine with 600 hp / 800 Nm Brand Audi The new Audi RS6 Avant has been officially unveiled and will reach customers in the first part of next year. The new model features a 48 V mild hybrid system and a 4.0-liter twin-turbo V8 engine with 600 hp and 800 Nm. The new Audi RS6 Avant... By spare-wheel, 22 August, 2019