The glorious high-revving 4.2-litre V8 that powers the RS4 gets plumbed into the RS5’s nose, complete with two small and highly responsive turbochargers that will take peak power up to the 450bhp. That’s not a great deal more than the S5’s 354bhp, but the RS5 searing pace will come from its phenomenal blower-enhanced torque – expect at least 500lb ft of twist action to plateau across the rev range. With its quattro all-paw grip, the RS5 should scrabble to 60mph in four and a half seconds and hit an easy 155mph before the electronics call it a day. Like the S5, the hot RS5 will exploit the new A5 chassis layout, which has shifted the front axle 120mm further forward for a better 55:45 front-rear balance. But don't think that the RS5 will be a mere point-and-shoot speed weapon – Quattro waved it magic wand over the RS4, and the RS5 is expected to be just as pin-sharp to drive.
To this end, the RS5’s rear-biased quattro system will give the big coupe a more neutral handling balance. To keep the RS4 on the straight and narrow and keep a tight rein on body control, it will be fitted with carbon ceramic brakes lifted from the R8, 19inch alloys, as well as modified magnetic ride dampers borrowed from the TT. All this technology and pace will come at a price – expect the RS5 to wade in with a £53,000 price tag, in line with BMW’s £50,625 M3.