With Audis new A4 generation having debuted in Frankfurt last week, Audiphiles thoughts are now with the more sporting versions of Ingolstadts bread-and-butter model. Motor Authority offers a spate of digitals that show what looks to be the coming Audi S4, due later this year. Revised bumpers, trunklid spoiler and qiad exhausts give away the goods on the variant, which like its predecessor will be powered by Audis sublime 4.2-liter FSI V8. Itll also come with Audis new understeer-reducing differential system that distributes engine torque in continuously variable proportions between the rear wheels. But dont get too keyed up; word is the next super-sport RS4 wont arrive until 09. [Motor Authority]