2016 Audi A8 4.0L Petrol · 10 MP

The 4.0-litre petrol engine is a relatively thirsty unit for a luxury saloon, with real-world fuel economy typically in the mid-20s mpg, meaning fuel costs alone could exceed £2,500 per year for higher-mileage drivers. Road tax for a petrol vehicle of this age and CO2 output will sit in a higher bracket, likely £200-£300 annually depending on exact emissions. Insurance for an Audi A8 with this engine will be in a high group, potentially £800-£1,200 per year for a standard driver. Servicing and parts are premium-priced, with major items such as brake discs, suspension components, and tyres costing notably more than mainstream brands, so budget £800-£1,200 annually for routine maintenance outside of fixed-price servicing. Overall estimated annual running costs are in the region of £3,200-£4,000, excluding any major repair items.

Given the model-level data highlighting tyres, headlamps, and suspension arms as the most common MOT failure reasons for the A8, these should be the priority inspection points. Check all four tyres for brand, age, and even wear patterns — the 2022 advisory noted uneven rear tyre wear, which can sometimes point to alignment or suspension geometry issues rather than simply old rubber. Inspect the headlamps for condensation, lens clarity, and correct operation, particularly the adaptive or LED units which can be expensive to replace if failed. Examine the front suspension arms and bushes for play, cracking, or perishing, as these are a known wear item on A8s of this era. On the 4.0-litre V8 specifically, listen for any timing chain rattle on cold start, check for oil leaks around the sump and cam covers, and verify coolant condition. The 2023 advisory mentioned a slightly distorted front wheel — physically inspect the wheel for cracks or buckling, and check the front tyres for inner-edge wear which could indicate the wheel has been impacting ride quality.