Audi A8 review

Overview

The D4 A8 can now cost less to buy than many ordinary used family cars, but it remains a complicated luxury saloon to maintain. This review selects an early-2015 UK facelift 3.0 TDI quattro SE Executive with the 258 PS engine and eight-speed tiptronic, before the subsequent 262 PS update. It is the standard-wheelbase car, not an A8 L, S8 or hybrid. RoadMatch's recommendation is conditional on specialist inspection, complete records and a substantial contingency. It suits a buyer deliberately accepting older-premium trade-offs, rather than somebody interpreting a low purchase price as evidence that the car has become inexpensive in every sense.

Exterior and interior

The A8's restrained exterior gives little warning of how much equipment can sit beneath it. Inside, the traditional dashboard and careful trim presentation remain appealing to drivers who prefer physical controls to a screen-dominated environment. Autocar supports its perceived quality, but the condition of an eleven-year-old example is more important than its original showroom impression. Check seat adjustment, upholstery, wood or metal trim, door operation and the retracting infotainment display. Options vary significantly, so a photograph of another SE Executive cannot establish this car's seats or rear amenities. Inspect the build record and try the actual driving position; a luxurious cabin must still fit the owner's body and daily routine.

Practicality

The selected conventional 3.0 TDI has a manufacturer 490-litre luggage figure, not the petrol or hybrid capacity. A separate saloon boot and fixed shape limit the usefulness of that number for tall objects. Try your suitcases, golf bag or mobility equipment through the opening before purchase. The standard-wheelbase A8 also should not inherit the rear accommodation of an A8 L: Autocar's assessment explicitly identifies rear-space limitations in the shorter car. Five seats do not make it a practical three-child-seat family vehicle without a physical fit test. If carrying rear passengers is central to the purchase, judge access, foot space and headroom with the front seats in their normal positions.

Driving experience

The A8 combines an automatic gearbox, quattro drivetrain and air suspension, but the resulting comfort depends on specification and condition. Autocar and Auto Express both raise reservations about ride or road noise, particularly when larger wheels and certain setups are involved. RoadMatch consequently favours a comfort-focused example and a proper test over assuming that flagship status guarantees softness. Include coarse motorway tarmac and damaged town roads, and compare suspension settings without letting the seller rush the process. Steering involvement is secondary to stable, low-effort touring here. A car that pulls, vibrates or changes height unpredictably needs diagnosis, even if its engine feels impressively strong.

Performance

The period manufacturer table specifies 258 PS, approximately 254 bhp, and a 5.9-second 0–62 mph figure for the selected facelift V6 diesel. Later 262 PS cars and larger engines are separate derivatives, so their numbers should not be merged. This is substantial performance for everyday touring, and its useful character lies in acceleration without repeatedly working through gears manually. On a used example, look for clean delivery, smooth engagement and sensible gearbox response from cold as well as fully warm. Quattro is a traction arrangement, not protection from excessive speed or inadequate tyres. A brisk demonstration cannot replace checking fault memory and the history of transmission or emissions repairs.

Fuel economy

A diesel A8 can use less fuel on a long journey than its size and original positioning might suggest, but economy is not the same thing as cheap ownership. The early manufacturer table uses NEDC and includes specification qualifications, so RoadMatch does not assert one universal figure for every SE Executive on optional wheels. Its annual cost model assumes 40 mpg as a planning input, not a measured road-test result. Short cold trips make a weaker case for this diesel and can bring emissions-system concerns into sharper focus. Ask for actual fuel records if efficiency is central to your decision, and allow for traffic, winter conditions and the energy used by extensive comfort equipment.

Reliability

This A8 contains enough expensive systems that a coherent specialist history is essential. Air suspension, multiple electronic modules, diesel emissions hardware, automatic transmission and comfort mechanisms all deserve investigation. Obtain a pre-purchase inspection and diagnostic report, and do not accept cleared warnings as proof that a problem has been resolved. An overnight ride-height check can reveal behaviour a brief showroom visit misses, while a genuine cold start gives more useful information than an engine already warmed by the seller. RoadMatch's moderate-confidence score is an original judgement of age, complexity and inspection exposure, not a failure-rate statistic. Buy only with a reserve that can absorb a repair outside an ordinary servicing allowance.

Safety

No exact D4 A8 Euro NCAP crash-test record was found in the bounded research, so this review does not invent a test or transfer the A4, A7 or newer A8's result. Audi's official rescue-information resource identifies the A8/S8 2010–2017 family, providing honest manufacturer safety context rather than a consumer crash rating. The actual airbag, belt and assistance equipment must be checked against the build record, and optional technologies should not be advertised as universal. Inspect accident repair quality, especially where sensors, glazing or suspension were involved. Use the GOV.UK registration recall procedure and Audi's VIN campaign record to establish which remedial work is complete and which remains outstanding.

Technology and features

The D4's MMI system and broad option list were advanced for their period, but a 2015 car should not be promised modern smartphone integration or the newer A8's touchscreen architecture. Test the retracting display, controller, navigation, audio and telephone connection with your own device. Connectivity can depend on older mobile networks, hardware and subscriptions, so original brochure capabilities may no longer be fully useful. Reversing camera, adaptive cruise and other high-value options need individual confirmation. Demonstrate all seat and climate functions rather than focusing only on the central screen. Expensive equipment adds little ownership value when it is unreliable or when repairing it would exceed the buyer's contingency.

Running costs

RoadMatch's 3 October 2026 editorial purchase range is £11,000–£17,000, with an annual planning allowance of £2,700–£3,900 for 8,000 miles. These are not live valuations, insurance quotes or statistical repair forecasts. The model assumes 40 mpg and diesel at £1.50 per litre, with servicing, tyres and a routine maintenance reserve. Major air-suspension, engine, transmission or electronic repairs are explicitly outside the allowance, as are insurance, finance and depreciation. Obtain specialist service and tyre prices before purchase and a personal insurance quotation. The registered tax details also need confirmation. If a single substantial repair would make the car unaffordable, a simpler newer vehicle is the more coherent choice.

Advantages and disadvantages