Audi

The short version

Audi built its performance reputation on all-wheel drive, and the quattro system remains the thread that ties the range together. The RS models turn that traction into usable pace in almost any weather, which is why an RS3 or RS6 can be a daily driver in a way that a rear-wheel-drive rival often is not.

That breadth is also the trap. Audi shares platforms and engines across the Volkswagen Group, so a used example can look like good value until the specific weaknesses of its engine and gearbox surface. The cars reward buyers who know which generation they are looking at, and which components are expensive to put right.

The models that define the brand

The original Quattro of the 1980s made four-wheel drive a performance tool rather than a winter convenience, and the five-cylinder turbo engine became the brand's signature sound. The TT arrived in 1998 as a style-led coupe that shared its platform with the Golf, and it ran through three generations before production ended. The R8 arrived in 2006 with a mid-mounted V8 and later a V10, and it remains the only true supercar Audi has built at volume.

The RS line is where most enthusiast money goes. The RS3 uses a 2.5-litre five-cylinder turbo and is the smallest and most characterful modern RS. The RS4 moved from a twin-turbo V6 in the B5 to a naturally aspirated V8 in the B7 and back to a forced-induction V6 in later cars. The RS6 is the large estate and saloon flagship, with a twin-turbo V8 in the C5, a twin-turbo V10 in the C6 and a twin-turbo V8 in the C7 and C8, plus a reputation for swallowing motorway miles at speed.

The e-tron GT shares its platform with the Porsche Taycan. It is quick, quiet and heavy, and it is the most expensive Audi to repair when body or battery work is needed.

What it costs to own

A routine service on a mainstream A3 or A4 typically falls between £250 and £500, while an RS model typically costs £500 to £1,000 depending on the interval. Tyres on an RS3 are £700 to £1,000 a set, and an RS6 can run to £1,200 or more. Brakes are a bigger item: front discs and pads on an RS6 can run to £1,200 to £2,000, and carbon-ceramic systems cost several thousand pounds to replace.

The five-cylinder RS3 is generally robust, but the DSG gearbox needs attention. Mechatronic unit failures are well documented, and a replacement can run to four figures. Older S tronic cars can also suffer clutch pack wear. The 2.0 TFSI engine used across the range is prone to carbon build-up on the intake valves because it is direct injection, and a walnut blast is a routine maintenance item rather than a fault.

Air suspension on the A6, A7, Q7 and Q8 is comfortable but expensive when it leaks. Magnetic ride dampers on the TT, R8 and various S models can fail, and replacements are costly. Some EA888 engines had timing chain tensioner issues, so the service history matters.

Known weak points

• DSG and S tronic: mechatronic faults, jerky low-speed behaviour and clutch wear.
• 2.0 TFSI: carbon build-up on intake valves, PCV failures and water pump leaks.
• EA888 timing chain: tensioner wear on earlier generations, especially with long oil intervals.
• Air suspension: compressor and bag leaks on A6, A7, Q7 and Q8.
• Magnetic ride: damper failures and expensive replacements.
• RS6 and RS4: brake and tyre costs, plus cooling and oil-consumption issues on tuned cars.
• R8: clutch wear on the manual, S tronic faults and expensive body panels.
• e-tron GT: battery and software complexity, plus limited independent repair options.

What to check before buying

Start with the service record and confirm the oil has been changed more often than the long-life schedule suggests. On a 2.0 TFSI car, ask whether the intake valves have been cleaned and listen for a rough idle. On a DSG car, drive slowly in traffic and feel for hesitation or judder, then check for any stored gearbox codes.

On an air-suspended model, leave the car parked overnight and check the ride height in the morning. A car that sits low at one corner has a leak. On a magnetic ride car, switch between comfort and dynamic modes and listen for knocking. Check the brakes for wear and the wheels for cracks.

For an R8 or RS6, a specialist inspection is worth the cost. These cars are often driven hard.

Market and depreciation

The R8 has been the strongest modern Audi by value, particularly the V10 Plus and the later rear-wheel-drive models. The TT has depreciated heavily, which makes a clean one a bargain but limits the upside. The RS3 holds value well because it is compact, fast and easy to live with. The RS4 and RS6 depreciate like large performance cars, and the C7 RS6 has become a popular used buy.

The e-tron GT has depreciated steeply, like most large electric cars.

Who it suits

Audi suits a buyer who wants performance that works in the rain and a cabin that is comfortable on a long journey. It also suits someone who wants a fast estate or a compact saloon without the running costs of a dedicated sports car. It does not suit a buyer who wants rear-wheel-drive steering feel or the cheapest possible route into a performance badge.

How this profile was compiled

This profile uses Audi's published model information, service schedules, owner reports from Audi-Sport.net and current UK market listings. It is a buying guide rather than a drive story.