Audi RS4 Avant B5
The 1999 Audi RS4 Avant B5 was the second RS model from Audi (following the RS2) and established the RS4 as one of the brand's most iconic performance nameplates. Built exclusively as an Avant (wagon), the B5 RS4 combined a twin-turbocharged 2.7-liter V6 producing 375 horsepower with the permanent Quattro all-wheel-drive system, creating what was arguably the fastest production station wagon in the world at the time of its introduction.
The engine was a heavily modified version of the 2.7-liter twin-turbo V6 found in the S4, but with extensive modifications including larger K04 turbochargers, revised intake manifold, reprogrammed engine management, and a freer-flowing exhaust system. The 375 horsepower output was accompanied by 325 lb-ft of torque available across a broad rev range, providing the RS4 with devastating real-world performance. The six-speed manual gearbox was the only transmission offered.
The RS4's body was significantly wider than the standard A4/S4, with flared wheel arches that accommodated wider 255-section tires. The aggressive body kit, large front air intakes, and RS-specific details created a visual statement that was unmistakable. The interior featured Recaro sport seats, carbon-fiber trim, and RS-specific instrumentation. Despite its performance focus, the RS4 retained the practicality of the Avant body, with a generous cargo area that made it a viable daily driver.
The B5 RS4's performance placed it among the fastest production cars of its era, regardless of body style. The 0-62 mph sprint was dispatched in approximately 4.9 seconds, and the top speed was electronically limited to 155 mph (170 mph with the limiter removed). The Quattro system's traction advantage meant these figures were achievable in virtually any weather condition, giving the RS4 a real-world performance advantage over rear-wheel-drive competitors.
Only 6,030 B5 RS4 Avants were produced during the 2000-2001 production run, and the model was not sold in North America. Today, the B5 RS4 is one of the most sought-after Audi performance cars, valued for its raw character, twin-turbo engine sound, and the practical wagon body. Values have risen significantly as the car's significance in the Audi RS lineage has become appreciated.
The twin-turbo V6 is the most critical area of inspection. Check for turbo condition, boost leaks, and wastegate operation. Timing belt service history is essential. The wide-body panels should be checked for paint match and repair evidence. The Quattro system should be tested on varied surfaces. Rust is less common than on older Audis but check the sills and wheel arches. Verify import compliance for non-European markets.
Built at Audi's Neckarsulm plant in Germany. 6,030 units were produced during the 2000-2001 production run. The RS4 was not officially sold in North America.