Audi S4 B5
1997-2002
The B5 S4 represents Audi's breakthrough into serious performance territory with its revolutionary twin-turbo V6. This unassuming sedan could transform from mild-mannered daily driver to tire-shredding monster with minimal modifications, establishing a template for future performance Audis.
Quick Take
The B5 S4 introduced Audi's legendary biturbo V6 that would define performance Audis for years to come. Known for exceptional tuning potential and quattro all-weather capability. A cult classic among enthusiasts for its understated looks and massive aftermarket support.
Best For
Key Strength
Tuning Potential
Watch For
Engine Reliability
The Story
Heritage & Legacy
Launched in 1997, the B5 S4 was Audi's answer to BMW's M3 and Mercedes' C36 AMG. It introduced the legendary 2.7T engine that would power multiple Audi models and become one of the most tunable engines ever produced, cementing Audi's reputation in the performance sedan segment.
Design Philosophy
Audi embraced the 'wolf in sheep's clothing' approach with subtle S-specific styling cues including quad exhausts, side gills, and distinctive wheels. The interior featured Recaro sport seats and aluminum trim, hinting at the performance potential beneath the conservative exterior styling.
The Driving Experience
Engine Character
The 2.7T delivers smooth, linear power with characteristic turbo whoosh and minimal lag thanks to its twin KKK turbochargers. The engine feels refined at low RPMs but transforms into a torque monster under boost, with an addictive rush that builds throughout the rev range.
Chassis Dynamics
Quattro all-wheel-drive provides exceptional traction and confidence in all conditions, while the sport-tuned suspension offers a perfect balance of comfort and control. The chassis feels planted and predictable with neutral handling characteristics that inspire confidence on both street and track.
Sound Signature
A distinctive turbo whistle and wastegate chatter accompany a refined V6 growl from the quad exhausts.
Strengths & Tradeoffs
Defining Strengths
The 2.7T engine responds exceptionally well to modifications, easily capable of 400+ horsepower with basic upgrades. The twin-turbo setup and strong internals make it one of the most tuneable engines of its era.
The mechanical Torsen-based quattro system provides superior traction and handling compared to many modern systems. It delivers power where needed without electronic intervention, creating a pure driving experience that modern cars struggle to match.
Honest Tradeoffs
The 2.7T is notorious for carbon buildup, turbo failure, and timing chain issues. These problems are expensive to fix and virtually inevitable with age, making ownership costly for those unprepared for major repairs.
While well-designed, the interior materials haven't aged gracefully. Plastics become brittle, leather cracks, and electronic components fail regularly after 20+ years.
Ideal Owner
Perfect for enthusiasts who want a capable daily driver with serious modification potential and prefer subtle performance over flashy styling.