New RS4 Avant, RS5, and RS5 Sportback will receive the 2.9L biturbo V6 from the Panamera. Engine features a top mount hot-v turbo setup. The RS models get increased power output over the Panamera, to 450hp and 442tq.
RS5 to be unveiled in March at Geneva Auto Show.
http://www.motor1.com/news/133393/au...-specs-leaked/