About the Audi A8
The Audi A8 is the brand's flagship luxury saloon, competing directly with the BMW 7 Series and Mercedes-Benz S-Class. Available in standard and long-wheelbase versions, the A8 combines Audi's signature quattro all-wheel drive system with a range of powerful engines including 3.0-litre TDI diesels, 3.0-litre TFSI petrols, and high-performance 4.0-litre V8 options in S8 variants. The interior showcases premium materials, cutting-edge infotainment systems, and executive-level rear passenger accommodation.
Key features include adaptive air suspension, virtual cockpit digital displays, matrix LED lighting, and comprehensive driver assistance systems. The aluminium-intensive construction keeps weight down whilst maintaining rigidity and refinement. Most UK examples are well-specified with leather upholstery, four-zone climate control, and premium sound systems as standard.
What Affects the Price
Age and generation: The D4 generation (2010-2017) represents the bulk of the used market, with prices starting around £8,000 for early examples. The newer D5 generation (2017-onwards) commands £30,000-£45,000. Facelift models typically hold £2,000-£4,000 more than pre-facelift equivalents.
Mileage: Lower mileage examples under 50,000 miles command significant premiums. High-mileage cars over 100,000 miles can be £10,000-£15,000 cheaper than comparable low-mileage versions, though service history becomes critical at these levels.
Engine choice: The 3.0 TDI diesel remains most popular and holds value well due to strong performance and reasonable running costs. Petrol V6 and V8 models depreciate faster but offer lower purchase prices. S8 performance variants command premiums of £5,000-£8,000 over standard models.
Specification: Long-wheelbase models add £2,000-£3,000. Options like rear-seat entertainment, panoramic roofs, upgraded sound systems, and advanced driver aids significantly impact values. SE Executive and Black Edition trims are particularly desirable.
Buying Tips
Service history: Comprehensive main dealer or specialist service history is essential. The A8 requires regular maintenance including air suspension servicing, dual-clutch gearbox oil changes, and complex electrical system diagnostics. Budget £800-£1,200 annually for servicing.
Common issues: Check air suspension for leaks or failure (£1,500-£2,500 per corner to repair). Inspect for DPF issues on diesels, particularly on low-mileage urban-driven cars. Test all electrical systems thoroughly including MMI infotainment, digital displays, and powered rear seats. Gearbox mechatronic units can fail (£2,000-£3,000 repair).
Running costs: Expect 35-45mpg from TDI models, 25-30mpg from petrol V6s. Insurance sits in high groups (40-50). Annual VED ranges from £190-£600 depending on registration date and emissions. Budget for premium tyres (£800-£1,200 per set) and brake components.
Pre-purchase inspection: Given complexity and repair costs, an independent inspection by an Audi specialist (£150-£250) is highly recommended. Check for outstanding finance and verify mileage authenticity through service records and MOT history.