We’ve already spotted prototypes of the next-generation Audi S4 undergoing tests at the Nurburgring, but now first pictures of the finished production model have been snapped by our spies. This new-generation Audi S4 will make its debut at the Paris motor show in October. Exterior changes seem slight and subtle compared with the standard A4, mostly based around more aggressive front and rear. Quad exhaust pipes are the biggest giveaway of the S4’s performance potential, but it also gets polished aluminium-effect wing mirrors, plus a deeper S-Line style front bumper and LED lights front and rear. It’s clear that, in design terms, plenty of ‘headroom’ has been left for a more visually forceful RS4.Thanks to a leaked Audi document we know that the S4 will get a 333bhp, supercharged 3.0-litre V6 under the bonnet in place of the previous generation’s 4.2-litre naturally aspirated V8. The move is part of Audi’s drive to reduce fuel consumption and CO2 emissions.Insiders tell us that Audi has also reduced the weight of the new S4 to further improve fuel economy and boost performance. Audi sees the new S4 as a rival for the likes of BMW’s 335i while the next RS4 will take the fight to the M3.