The Retreat Web Design December 3, 2018 Audi 2018 Audi RS3 2.5 TFSI 400 BHP The Retreat Web Design December 3, 2018 Audi Tuned today at the workshop was this lovely RS3 with a standard 400 BHP these aren't by any means a slow car to start with but with our stage 1 software installed after some checks we managed to pep the power up to a healthy 470 BHP!