The Audi RS4 B7 remains an icon in the realm of high - performance sedans, anchored by a heart that beats with the same rhythm as early Audi R8 supercars. Launched in 2005, this second - generation RS4 redefined expectations for what a family sedan could achieve, blending everyday practicality with a ferocious V8 engine that borrowed its soul from Audi’s flagship sports car.

At the core of the RS4 B7 lies a 4.2 - liter naturally aspirated V8 engine, a masterpiece that screams to an 8,500 rpm redline while churning out 414 horsepower and 430 Nm of torque. This powerplant, identical to the unit found in the first - generation Audi R8 (2006–2015), delivered a sonorous, high - revving experience uncharacteristic of sedans. Mated to a six - speed manual transmission (or optional Tiptronic), the RS4 B7 catapulted from 0 - 60 mph in 4.8 seconds, with a top speed electronically limited to 155 mph (250 km/h). The V8’s linear power delivery, combined with Audi’s quattro all - wheel - drive system, ensured brutal acceleration and tenacious grip through corners, blurring the line between sedan and sports car.

The RS4 B7’s design matched its performance prowess, featuring widened fenders, a grille, and quad exhaust pipes that hinted at its supercar DNA. Under the skin, a sport - tuned suspension, upgraded brakes, and 18 - inch alloy wheels (with optional 19s) further enhanced its dynamic capabilities. Inside, the cabin balanced luxury with performance, offering bolstered sport seats, aluminum trim, and a driver - focused layout. Decades later, the RS4 B7 remains a cult favorite, celebrated for its unique blend of a high - revving R8 engine in a practical sedan body. It’s a testament to Audi’s engineering audacity—proving that a family car could house the heart of a supercar and still excel in daily life.