The 2004 Audi S4, part of Audi's B6 generation, is an acclaimed luxury sports car known for its stellar performance. It is powered by a 4.2-liter V8 engine that generates 340 horsepower, paired with either a six-speed manual or automatic transmission, delivering power to all four wheels through Audi's esteemed quattro all-wheel-drive system. Two body styles were available on the 2004 S4 – Sedan and Avant (wagon). The car handles superbly, harnessing its balanced chassis and substantial grip for responsive, agile performance. Inside, the car is decked out with upscale materials and features a comfortable, yet sporty interior that includes dual-zone automatic climate control, heated front seats, leather upholstery, and Audi's Symphony audio system. However, it lacks modern infotainment technologies given its age, such as a large touchscreen or Apple CarPlay/Android Auto compatibility.