
Audi S4/S5 B9 Buying Guide
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Audi S4/S5 B9 Buyers Guide

The Audi S4 and S5 B9 models represent Audi’s modern approach to performance and daily usability. Although they share much of the same technology and engineering, subtle differences in body style and equipment mean that buyers should consider their individual needs when choosing between them.
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Overview of the B9 Models
Both the S4 and S5 B9 benefit from Audi’s latest performance technologies, including a twin-turbocharged V6 engine and Quattro all-wheel drive. Under the bonnet, the two models are very similar, offering comparable power output and handling characteristics. Buyers can expect precise steering, a balanced ride, and a range of electronically assisted features that make these cars suitable for both spirited driving and everyday use.
Key Differences
Body Style and Practicality
One of the primary distinctions lies in their body styles. The S4 is traditionally offered as a saloon, with some markets also seeing a wagon variant. This setup provides a more practical cabin layout and easier access to the rear seats, making it a sensible option for those who require extra passenger space or a larger boot.
In contrast, the S5 leans towards a sportier presentation. It is available as a coupe or convertible, with a design that emphasises a lower, more dynamic profile. While this styling may limit rear-seat access and boot space compared to the S4, it appeals to buyers looking for a more stylish, driver-focused car.
Trim Levels and Options
Audi provides a range of trim levels and option packages across the S4 and S5 models. Standard equipment often includes the S line exterior package, which delivers a sportier appearance without being overly ornate. The interior typically features a combination of supportive seating and modern infotainment systems.
For those seeking additional features, higher trim levels such as Premium Plus or Prestige add advanced driver assistance systems, upgraded sound systems, and enhanced connectivity options. Buyers should consider:
- Infotainment and Connectivity: Advanced navigation, connectivity with smartphones, and higher quality audio systems are available on the upgraded trims.
- Driver Assistance: Features such as adaptive cruise control, lane assist, and parking sensors may be standard on the higher-spec models.
- Interior Enhancements: Options for upgraded leather seating, ambient lighting, and additional trim details can be found in the more expensive packages.
When comparing the two models, it is important to note that the availability of certain trims or packages may vary by region. Prospective buyers should check the local specifications to ensure that the desired features are included.
What to Look Out For When Buying
Service History and Maintenance
Given the performance focus of the S4 and S5, thorough maintenance is crucial. Prospective buyers should:
- Request a full service history to confirm regular maintenance.
- Check that the car has been serviced according to Audi’s recommended schedule.
- Consider having a trusted mechanic inspect the vehicle, particularly if purchasing a used model.
Wear and Use
Performance components such as brakes, suspension, and tyres can show wear faster than on non-performance vehicles. It is advisable to inspect these areas for signs of excessive use or neglect. Additionally, ensure that all electronic systems and driver assistance features are functioning correctly.
Warranty and Modifications
It is worth confirming whether any modifications have been made to the car. Aftermarket changes, especially those affecting performance or suspension, might impact the warranty or long-term reliability. Buyers should also verify any remaining warranty coverage or available extended warranty options.
Final Thoughts
The Audi S4/S5 B9 models offer a blend of modern performance technology and practical usability. While the S4 is generally more suited to those in need of a family-friendly saloon or estate, the S5 appeals to buyers prioritising a sportier, more distinctive design. By considering trim levels, available options, and the car’s history, potential owners can make an informed decision that best suits their driving needs.
Before finalising a purchase, a thorough test drive and independent inspection are recommended to ensure that the chosen vehicle meets expectations. With careful consideration, owning a B9 Audi can provide a rewarding balance between performance and everyday practicality.