2005 Audi S4 quattro

Freshly listed and ready to deliver serious performance is this 2005 Audi S4 Sedan, a true enthusiast’s machine that blends German engineering with aggressive aftermarket upgrades for an unforgettable driving experience.

Finished in a sleek black exterior, this S4 carries a timeless and understated performance look that Audi is known for. Inside, you’ll find a premium black leather interior that offers both comfort and sport-focused design, with supportive seating and a driver-oriented layout. The cabin is further enhanced by custom aftermarket gauges, giving it a purposeful, performance-built feel while keeping key engine data right in your line of sight.

Under the hood, this S4 is powered by Audi’s legendary 4.2L V8 engine, originally paired with a quattro all-wheel-drive system that provides exceptional grip and control in all driving conditions. What truly sets this vehicle apart is its extensive performance build—this example has been fully supercharged and equipped with water-methanol injection, along with an upgraded exhaust system. The result is a dramatically increased output of over 500 horsepower, transforming this sedan into a seriously fast and engaging car that pulls hard and delivers an exhilarating driving experience.

With 149,500 miles, this Audi has clearly been enjoyed, but the 4.2L V8 platform is well-regarded for its strong performance capabilities, especially when properly maintained and thoughtfully modified like this one. It drives well and remains a thrilling option for someone looking to step into a high-horsepower vehicle without the high cost typically associated with builds of this caliber. Please note there is a minor issue with the shifter, but it does not take away from the car’s ability to run and drive.

Additional highlights include newer Audi wheels that give the car a refreshed and modern stance, along with the unmistakable sound and presence of its upgraded exhaust system. Whether you’re looking for a unique daily driver, a weekend performance car, or a standout project with serious power already built in, this S4 checks all the boxes.

Priced at just $3,999, this Audi S4 represents an incredible value, especially considering the extensive modifications and performance upgrades already in place. Comparable performance builds can easily cost significantly more, making this a rare opportunity to own a 500+ horsepower sedan at a fraction of the investment.

If you’re searching for a fast, distinctive, and heavily upgraded sports sedan that stands out from the crowd, this 2005 Audi S4 is ready to impress. Vehicles like this don’t stay available for long—reach out today and take advantage of this unique opportunity before it’s gone. Our buying experience is nothing like a traditional dealership. We operate more like a car curator, sourcing vehicles priced similarly to what you would find from private sellers on Facebook Marketplace or Craigslist, but offering them all in one centralized location for easy viewing and comparison. There is no pressure to buy, no forced upsells, and no runaround. Just straightforward pricing and honest descriptions so you can choose what works best for you. Financing is available for all applicants, with zero percent interest and as little as $500 down for qualified buyers. We are open Monday through Saturday from 9AM to 6PM, and Sundays by appointment. We are located in Fort Lauderdale, FL, with nationwide and international shipping available. All paperwork is handled for a smooth and seamless purchase.