The Best Years For Audi Rs 4 And Some To Avoid

The Audi RS 4 is a performance icon, representing the pinnacle of Audi's A4 lineup. Known for its potent engines, quattro all-wheel drive, and aggressive styling, the RS 4 has captivated enthusiasts for years. This guide aims to navigate the different generations and model years, helping you identify the best examples and those to approach with caution.

RS 4 Generations: A Quick Overview

Detailed Explanations

B5 (2000-2001)

The B5 RS 4 is a true legend. It was only produced for a short period, making it relatively rare. Its 2.7-liter bi-turbo V6 engine, developed in collaboration with Cosworth, produces a significant amount of power and is highly tunable. However, these cars are now over two decades old, so potential buyers should be prepared for age-related maintenance and potential issues with the turbos and complex engine components. Rust can also be a concern, especially in colder climates. Due to its age, finding a well-maintained example can be challenging.

B7 (2006-2008)

The B7 RS 4 marked a significant departure from the B5, featuring a naturally aspirated 4.2-liter V8 engine. This engine is known for its incredible sound and high-revving nature, making it a joy to drive. The B7 was available in three body styles: sedan, Avant (wagon), and Cabriolet. This generation, however, is known for carbon build-up issues, which can significantly affect performance. The DRC (Dynamic Ride Control) suspension system, while offering excellent handling, can be prone to leaks and expensive repairs. Inspecting the DRC and checking for carbon build-up is essential before purchasing a B7 RS 4.

B8.5 (2012-2015, Avant Only)

The B8.5 RS 4 is essentially an updated version of the B8 (which was never offered as an RS 4 in most markets), featuring the same 4.2-liter V8 engine as the B7. The B8.5 received updated styling, improved interior technology, and refinements to the chassis. However, it was only available as an Avant (wagon) in most markets, limiting its appeal to some buyers. Like the B7, carbon build-up remains a potential issue. The B8.5 offers a more modern driving experience than the B7 while retaining the beloved V8 engine.

B9 (2017-Present)

The B9 RS 4 ushered in a new era with its turbocharged 2.9-liter V6 engine. This engine offers improved fuel efficiency and a broad torque curve, making it a more practical daily driver. The B9 also boasts modern technology and driver-assistance features. While some purists lament the loss of the V8, the B9's performance is undeniable. Early models might have some software glitches, but these are generally addressed with updates. The B9 represents the most technologically advanced and efficient RS 4 to date.

The Best Years: A Deeper Dive

Choosing the "best" RS 4 depends largely on individual preferences and priorities. Each generation offers a unique driving experience and has its own set of strengths and weaknesses.

For the Purist:

If you crave the raw, unfiltered experience of a turbocharged engine and manual transmission, the B5 RS 4 (2000-2001) is the ultimate choice. However, be prepared for potential maintenance challenges due to its age and complexity. Finding a well-preserved example is crucial.

For the V8 Enthusiast:

The B7 (2006-2008) and B8.5 (2012-2015, Avant only) RS 4 models offer the intoxicating sound and responsiveness of a naturally aspirated V8. The B7 provides a more raw and visceral experience, while the B8.5 offers a slightly more refined and modern feel. Be sure to thoroughly inspect for carbon build-up and DRC issues.

For the Modern Driver:

The B9 (2017-Present) RS 4 is the most technologically advanced and practical option. Its turbocharged V6 engine delivers impressive performance with improved fuel efficiency, and its modern features make it a comfortable and enjoyable daily driver.

Years to Avoid (or Approach with Caution)

While every RS 4 generation has its merits, certain model years or specific issues should be considered before making a purchase.

• Early B7 Models (2006): These models might be more prone to early production issues, so a thorough inspection is recommended.
• High-Mileage B7 and B8.5 Models: Due to the potential for carbon build-up, high-mileage examples of these generations should be inspected carefully and may require carbon cleaning.
• Any RS 4 with Neglected Maintenance: Regardless of the generation, an RS 4 that hasn't been properly maintained is likely to be a money pit. Always prioritize examples with a complete and verifiable service history.
• Modified B5 RS 4: Heavily modified B5s, especially those with aggressive tunes, can be less reliable than stock examples. Proceed with caution and ensure the modifications were done by a reputable shop.

Key Areas to Inspect Before Buying

• Engine: Listen for any unusual noises, check for oil leaks, and verify the service history. On B7 and B8.5 models, inquire about carbon cleaning and inspect the intake manifold for signs of build-up.
• Transmission: Ensure smooth shifting and no slipping. For manual transmissions (B5), check the clutch condition.
• Suspension: Inspect the shocks and struts for leaks or damage. On B7 models with DRC, check for leaks and uneven tire wear.
• Brakes: Check the brake pads and rotors for wear.
• Body: Inspect for rust, especially in areas prone to corrosion (e.g., wheel wells, undercarriage).
• Interior: Check for wear and tear, and ensure all electrical components are functioning properly.
• Electronics: Verify that all electronic systems, including the infotainment system, climate control, and driver-assistance features, are working correctly.
• Service History: Review the service history to ensure the car has been properly maintained. Look for evidence of regular oil changes, filter replacements, and other preventative maintenance.

Understanding Common RS 4 Issues

• Carbon Build-up (B7 and B8.5): This is a common issue with direct-injection engines, where carbon deposits accumulate on the intake valves, restricting airflow and reducing performance.
• DRC Suspension Problems (B7): The Dynamic Ride Control suspension system can be prone to leaks and failures, requiring expensive repairs.
• Turbocharger Issues (B5): The B5's bi-turbo system can be complex and prone to problems, especially in high-mileage examples.
• Software Glitches (Early B9 Models): Some early B9 models may have experienced software glitches, but these are generally addressed with updates.

Frequently Asked Questions

Which RS 4 is the fastest?

The B9 RS 4 is generally considered the fastest due to its turbocharged engine and modern technology.

Which RS 4 is the most reliable?

The B9 RS 4 is likely the most reliable due to its newer design and technology, although regular maintenance is always crucial.

Is carbon build-up a problem on all RS 4s?

Carbon build-up is primarily a concern on the B7 and B8.5 models with naturally aspirated direct-injection engines.

Is the DRC suspension system reliable?

The DRC suspension system on the B7 can be prone to leaks and failures, requiring expensive repairs.

Are RS 4s expensive to maintain?

RS 4s are performance cars and can be more expensive to maintain than a standard A4.

Conclusion

Ultimately, the best year for an Audi RS 4 depends on your individual needs and preferences. The B5 offers a raw and iconic experience, the B7 and B8.5 provide the thrill of a naturally aspirated V8, and the B9 delivers modern performance and technology. Thorough research and a pre-purchase inspection are essential to ensure you find a well-maintained example that will provide years of driving enjoyment.