2011 The New Signature AUDI-S4 Challenge Edition

The 2010 edition of Audi's iconic S4 sees many subtle revamps from the previous year's model. While on the surface it may appear to be a minor refresh, under the bonnet there are some big changes afoot with the powertrain. Apparently even the stalwart German sports car manufacturers aren't immune to the cries of consumers being worn down at the gas pump by their fun and throaty (yet aggressively thirsty) V-8's. In a return to form, Audi has downsized from the 8 to a newly designed supercharged V-6 that cranks out 333-horsepower. While that's a 7 hp decline from the previous model, Audi makes a strong argument for getting a lot more in the trade. While a 7hp drop may sound steep, they jump to 324.5 lb-ft of torque, a gain of almost 23 lb-ft. And you get that torque at lower revs. Add that to the weight savings from dropping those two cylinders and you have a more nimble power plant that gives you all the S4 thrills you've come to expect while turning what used to be a sucker punch at the gas pump into more of a light open-handed slap across the face.

Audi aficionados might remember the 6-cylinder from older generations of the S4, but unlike the old twin-turbo V-6, this model relies on a single supercharger. So you can rest assured in the knowledge that Audi knows a thing or two about forced injection.

Signature S4 Touring Edition

* Exhaust - Quad outlet with tunable low RPM resonators
* Engine - Engine Tuning Software – performance increases to 410 bhp / 370 lb.ft
* Suspension – 1 inch lower, Increased spring rate, anti-roll bar kit and matched bushings & bump stops
* Brakes - Optional high-performance street pads and braided stainless steel lines
* Wheels – 20 inch x 8.5 inch lightweight cast aluminum wheels, Optional 19 inch x 9 inch lightweight cast aluminum wheels
* Tyres – High performance

Signature S4 Challenge Edition

* Exhaust - Quad outlet with tunable high RPM resonators (recommended for manual transmission)
* Engine - Engine Tuning Software – performance increases to 410 bhp / 370 lb.ft
* Suspension - Ohlins SL dampers, increased spring rate and high performance anti-roll bar kit
* Brakes - 6-piston Alcon monobloc calipers, 370 mm 2-piece discs (390-mm optional), stainless steel brake lines & high-performance pads
* Differential - high-bias centre differential (manual transmission only)
* Wheels – 20 inch x 9.5 inch ultra-lightweight forged aluminum wheels
* Tyres – extreme performance