Power for the souped-up model will come from the company's brand new 3.0-liter TFSI engine which also features in the new Audi A6 facelift, but the S4 will get a power boost up to 333hp.

Audi has released the first details and images of the Audi S4 which will be unveiled to the public at the Paris Motor Show in both Sedan and Avant form. Power for the souped-up model will come from the company's brand new 3.0-liter TFSI engine which also features in the new Audi A6 facelift. But whereas the larger sibling will have to make do with 290 bhp, the new Audi S4 will get a power boost up to 333hp(245kW) along with a peak torque figure of 440Nm (20Nm more than the A6).

The new engine is equipped with supercharger and direct injection technology, it allows the S4 sedan to catapult from zero to 100km/h in just 5.1 seconds whilst the Avant variant stands a further 0.1 seconds behind. Both body styles have a top speed of 250km/h that is electronically limited and despite the superb performance figures, the German's have engineered the model well enough to limit the fuel consumption to just 9.7 liters per 100km (24.25 US MPG) for the sedan and 9.9 liters per 100km (23.76 US MPG) for the Avant.

The S4 features a six speed transmission as standard, and as you would expect, consumers have the opportunity to upgrade to the dual-clutch seven-speed S tronic system which offers quicker and smoother gear changes over the conventional system. Power is then passed to the wheels via Audi's permanent all-wheel-drive system with a 60% bias going to the rear, adding to the overall sporty feel of the model. Audi's sport differential also adjusts this torque flow when required, such as when the car accelerates round corners.

The S4 has received a number of exterior modifications to differentiate it from the regular A4 while also keeping it consistent with the other “S” models in the Audi line-up. These include a a slightly remodelled front apron with a grille featuring vertically opposed bars, xenon plus headlights with daytime running lights, 18-inch S-design light-alloy wheels, side rocker panels and a restrained spoiler at the rear with a quadruple exhaust system. The black themed interior features brushed aluminum inlays and gets a multifunctional sports steering wheel, sports seats and S4 emblems.

Audi will begin delivery of its new S4 models in March 2009.

Audi S4 Sedan & Avant Break Out Ahead of Paris Unveiling