Audi is launching at 2015 IAA the S4 Sedan and S4 Avant which share a newly developed V6 3.0 TFSI engine.

Those rumors about a new turbo-six for the next-gen S4 turned out to be accurate as Audi has introduced today in Frankfurt the warm S4 which in typical Ingolstadt fashion looks tastefully restrained even though it packs 354 PS (260 kW) and 500 Nm (369 lb-ft) of torque. The engine has more power than its predecessor and at the same time it's lighter and brings increased fuel efficiency. It works together with a new eight-speed tiptronic transmission which according to Audi has boosted efficiency and offers very quick gear changes.

Thanks to its new hardware, the 2016 Audi S4 Sedan will run the 0-62 mph (0-100 km/h) sprint in 4.7 seconds and will keep on accelerating until the electronic top speed limiter will be automatically activated at 155 mph (250 km/h). As for fuel consumption, it stands at less than 7.4 liters / 100 km (31.8 mpg US) which equates to 170 g/km of CO2 emissions.

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As you would expect from an S model, all that power is channeled to a quattro all-wheel drive system with a self-locking center differential that in normal driving channels 60% of the torque to the rear wheels. Depending on situation, it can send up to 70% to the front axle or up to 85% to the rear wheels in order to provide optimal traction regardless of road conditions and the car's speed.

The S4 sits 23 mm (0.9 inches) lower than the regular A4 and rides on 18-inch alloy wheels featuring 245/40 tires while optional 19-inch rims are going to cost extra. It weighs from 1,630 kg (3,593 lbs) in sedan form and 1,675 kg (3,692) if you go for the more practical S4 Avant.

Stepping inside the cabin, the cars are fitted with S sport seats wrapped around in pearl Nappa leather and Alcantara. You will also find illuminated door sill trims with the "S4" logo, matte brushed aluminum inlays and an optional 12.3-inch digital instrument cluster as seen in the regular variants. LED headlights are standard, but those willing to pay more can upgrade to the optional matrix LED headlights and other extra goodies like a head-up display or a tailgate sensor control for the S4 Avant.

Both the Audi S4 Sedan and S4 Avant are programmed to go on sale next year.

