Table of Contents
Introduction
When the 2018 Audi A8 first hit the showroom floor, it carried the weight of a brand‑new flagship sedan that cost roughly £70,000. Fast forward to 2026, and a used example can be found for just £25,000 – a price that feels like a bargain when compared to a new hatchback. But is that price a smart investment or a financial trap? In this review, we unpack the A8’s engine, cabin, technology, and overall value to answer that question.
Engine & Performance
The heart of the A8 is a 3‑litre V6 diesel that delivers 282 horsepower and 600 Nm of torque. Over 6,000 miles of real‑world data, the car averages 39.2 mpg, proving it remains economical even after years of use. Acceleration is respectable: a 0‑60 test in dynamic mode clocks 5.98 seconds, matching Audi’s own claim of “under 6 seconds.” The standard quattro all‑wheel drive and adaptive air suspension give the car a smooth, planted feel, while the ZF 8‑speed automatic keeps gear changes seamless.
Interior & Comfort
Inside, the A8 feels like a floating cabin. The seats are plush and supportive, though they lack massaging functions that many competitors offer. The cabin is well‑insulated, and the steering wheel’s yacht‑style shape adds a touch of luxury. Materials are high‑grade, with Alcantara trim and leather accents that rival BMW and Mercedes. However, small cup holders and a lack of rear seat heating are minor drawbacks that may bother long‑distance drivers.
Technology & Features
Audi’s MMI system shines with a split‑screen digital cockpit, heads‑up display, and haptic feedback. Drivers can toggle between efficiency, comfort, auto, and dynamic modes, and the system supports Apple CarPlay and Android Auto. The rear seats feature a pop‑out tablet for controlling blinds, lights, and media, though the panoramic sunroof’s blind control is limited to the front. The car’s infotainment is intuitive, but the lack of a launch control system means the 0‑60 time is slightly slower than the 7 Series.
Value & Comparison
At £25,000, the A8 offers a level of luxury that would normally cost three times that amount new. Compared to a 2022 BMW 7 Series 730D, the A8’s older model still feels more comfortable and has a better interface, but the BMW’s B57 diesel engine delivers more torque and a slightly more engaging drive. The A8’s boot holds 505 L, which is modest compared to the 7 Series, but the spare‑tire space is practical. Maintenance costs remain a concern; the diesel engine and quattro system can be pricey to service, yet the overall ownership experience is still enjoyable.
Pros & Cons
- Pros: Excellent fuel economy, strong acceleration, high‑quality interior, advanced infotainment, and a smooth ride.
- Cons: Limited cup holders, no rear seat heating, lack of launch control, and higher maintenance costs.
Conclusion
In the end, the 2018 Audi A8 at £25,000 is a smart purchase for those who value a spacious, well‑equipped sedan that still feels fresh. While it may not match the newest 7 Series in every detail, its blend of performance, luxury, and affordability makes it a compelling option for anyone looking to step up from a hatchback without breaking the bank.