2018 Audi RS4 Avant (450 HP) Sound & Acceleration 0-260 km/h Acceleration & Sound by turboandstance - February 21, 2018February 21, 2018 This time wee have a acceleration and Start Up video of the new Audi RS4 Avant with 2.9L Bi-Turbo V6 engine! , The car is powered by 2.9-liter V6 BiTurbo with 450 HP and 600 Nm of torque! Watch the video and listen to this awesome stock 450HP Audi RS4 below