2005-2008 Audi RS4 B7 Cotton T-Shirt

The 2005-2008 Audi RS4 B7 redefined the sport sedan by combining a high-revving, naturally aspirated V8 with an all-weather capability that left rivals like the BMW M3 struggling for traction. It remains revered for bringing genuine supercar engine response to a practical, daily-driver platform.

Under the aluminum hood sits the BNS engine, a naturally aspirated 4.2-liter FSI V8. This direct-injection powerplant produces 414 horsepower at 7,800 rpm and 317 pound-feet of torque at 5,500 rpm. With an 8,250 rpm redline, it delivers linear power through a highly responsive, high-compression block.

Power is managed exclusively by a six-speed manual gearbox and sent to all four wheels via a rear-biased Torsen T-3 Quattro system. Audi's mechanical Dynamic Ride Control suspension hydraulically links diagonally opposed dampers, virtually eliminating body roll to yield immense mid-corner grip.

Audi built just over 10,000 B7 RS4s globally, making it a highly sought-after collector car today. Succeeding the twin-turbo B5 RS4, it represents the high-water mark for naturally aspirated Audi compact executives before the dual-clutch, Avant-only B8 RS4 took over the mantle in 2012.