The VW underneath the Audi badge
Here's what Audi doesn't emphasise in the brochure: every A4 engine is shared with other Volkswagen Group cars. The EA888 2.0 TFSI in your A4 is the same basic engine as the Golf GTI. The 2.0 TDI is the same unit in the Passat. The 1.4 TFSI is the same engine as the Skoda Octavia.
The difference is calibration, the body around it, and the badge on the steering wheel. The A4 costs 20–40% more to buy than the equivalent VW, and Audi-branded parts and labour add another premium on top. The question every used A4 buyer should ask is: does the engine justify the total cost of ownership?
Sometimes yes. The B8.5 A4 with the EA888 Gen 3 and quattro AWD offers something no Golf or Passat can match. But a B7 A4 with the 2.0 TFSI EA113 is a more expensive and less reliable car than the Golf it shares an engine with. The engine code matters more than the four rings.
B7 A4 (2004–2008): the one where generation matters most
The B7 is the oldest A4 worth considering as daily transport. It's also the generation where engine choice creates the widest gap between ownership experiences.
2.0 TFSI EA113 (B7, 2004–2008) — 73/100 ACCEPTABLE
This is the engine that powers the Golf GTI Mk5 — and in both cars, it has the same problems. Cam follower wear on the high-pressure fuel pump (the one critical item), cam-chain tensioner wear on early AXX engines, a timing belt that must be on schedule, and a PCV valve that VW covered with a 10-year warranty extension. The difference: in a Golf GTI, these repairs are annoying. In an A4 with Audi-priced labour, they're expensive.
If you're buying a B7 A4 2.0 TFSI, the cam follower is the first thing to check. It's a €5 part that destroys a €2.000 fuel pump if neglected. Later builds (2007+) improved the cam follower design.
The honest comparison: a Mk7 Golf GTI with the EA888 Gen 3 is faster, more reliable, and cheaper to maintain than a B7 A4 2.0 TFSI. The A4 only wins on interior quality and prestige.
2.0 TDI PD (B7, 2004–2008) — 52/100 CAUTION
The pump-düse 2.0 TDI in the B7 A4 is the same unit as in the B6 Passat. The serious risk is the balance-shaft module fitted to A4 engines such as the BLB and BRE: its oil-pump drive can wear and cut oil pressure, often destroying the engine or the turbo with little warning — ask whether the module has been replaced. Unit injectors, the dual-mass flywheel, the EGR valve and the turbo are frequent repairs too. In the A4, add the cost of quattro driveline maintenance (Haldex fluid changes, additional CV joints) and you have a car that costs meaningfully more to run than its VW equivalent.
Still, the B7 A4 2.0 TDI quattro is a genuine year-round car in countries with real winters. The drivetrain works — it just costs more than you'd expect.
1.8T EA113 (B7, 2004–2005) — 69/100 ACCEPTABLE
Carried over from the B6 for one year. The same 1.8 turbo from the Mk4 Golf and B5+ Passat. By the B7 era, this engine was well-understood: coil packs, boost leaks, and — the critical one — oil sludge that can block the oil pick-up and kill the engine in neglected examples. A known quantity, but at this age, condition is everything.
3.0 V6 TDI (B7, 2004–2008) — 68/100 ACCEPTABLE
The 3.0 V6 TDI is where the A4 starts justifying its premium. This engine doesn't appear in any Golf or Passat (the Passat only got it in the CC). 233 hp, effortless torque, and the mechanical refinement of a proper six-cylinder diesel. Paired with quattro, it's an autobahn car that happens to be sensible.
The weak points: the timing chains sit at the back of the engine, against the gearbox, so a stretched chain or worn tensioner is an expensive job; the intake swirl flaps stick with soot; and the EGR valve and DPF clog in city use. If the car has lived on motorways, the EGR and DPF are less of a worry. If it's been doing school runs, they aren't — and listen for a chain rattle after a cold start.
B8/B8.5 A4 (2008–2015): the sweet spot generation
The B8 introduced new engines and the B8.5 facelift (2012+) refined them. This is where the A4 value proposition becomes clearest.
EA888 Gen 1/2 2.0 TFSI (B8, 2008–2012) — 38/100 AVOID
The early EA888 in the B8 A4 is the same disaster as in the Mk6 Golf GTI — timing chain tensioner failure, excessive oil consumption, and piston ring issues. The difference: an A4 engine replacement costs more than a Golf engine replacement, and the car's residual value makes the repair even harder to justify.
If buying a B8 A4, check whether it's the Gen 1/2 (e.g. CDNC/CAEB codes, 2008–2012) or the Gen 3 (2013+ facelift). This single distinction is the difference between a 38/100 and an 84/100 engine.
EA888 Gen 3 2.0 TFSI (B8.5, 2013–2015) — 84/100 BUY
The B8.5 A4 with the Gen 3 EA888 is the first A4 generation where the 2.0 petrol engine is genuinely recommendable. Completely redesigned chain tensioner, integrated exhaust manifold, water-cooled turbo. This is the same proven engine as the Mk7 Golf GTI, and in the A4's more refined body, it makes a compelling case.
220 hp with the sport tune, quattro available, and reliable to 200.000+ km. The B8.5 A4 2.0 TFSI quattro is arguably the best all-round used car in the €12.000–€18.000 range for European buyers who want premium and reliability.
2.0 TDI CR (B8/B8.5, 2008–2015) — 62/100 CAUTION
The common-rail 2.0 TDI (EA189) replaced the pump-düse in the B8. Smoother and quieter, but not trouble-free: the Bosch CP4.1 high-pressure fuel pump can fail and send metal through the whole fuel system, and EGR valves, water pumps, turbo actuators and dual-mass flywheels are known wear points.
Dieselgate note: the B8 A4 with EA189 engines (2008–2015) was affected. The recall update is mandatory — check it by VIN. Some cars developed EGR valve faults after the update.
3.0 V6 TDI (B8/B8.5, 2008–2015) — 68/100 ACCEPTABLE
Continued from the B7, refined further. The B8.5 version produces 245 hp and 500 Nm — proper executive car performance from a diesel. This is the engine that makes the A4 worth buying over a Passat: the combination of six-cylinder refinement, quattro AWD, and the A4's chassis balance is genuinely better than anything VW offers.
It is not trouble-free, though. Timing chain stretch and tensioner wear on the rear-mounted chains is the big-ticket item, and the swirl flaps and EGR/DPF still clog. The later EA897 version (from 2010) adds camshaft wear on some 2014–2017 engine codes (CRT, CZV, CUE, CVM) and, on Euro 6 engines from 2014, AdBlue system faults. Check the engine code, listen for ticking or rattling on a cold start, and budget for the chains on a high-mileage example.
B9 A4 (2015–2023): modern, mature, and mostly reliable
EA888 Gen 3B 2.0 TFSI (B9, 2015–2023) — 84/100 BUY
An evolution of the Gen 3 with Miller cycle and variable turbo geometry in some variants. 190–252 hp depending on tune. The 190 hp "35 TFSI" is the volume seller, and it's a smooth, efficient engine that does everything well without drama.
In the B9, Audi shifted to a Haldex-based quattro for four-cylinder models and a Torsen-based system for the six-cylinders. The Haldex is less sporty but adequate — and it needs fluid changes every 60.000 km.
EA211 1.4 TFSI (B9, 2015–2019) — 78/100 BUY
The entry-level B9 A4 with 150 hp. This is the engine where the premium tax question is sharpest: the same 1.4 TSI powers the Skoda Octavia at significantly less purchase and maintenance cost. In the A4, it's smooth and refined but occasionally feels underpowered on the motorway with a full car and luggage.
Buy this if you value the A4 interior and badge enough to pay the premium. Skip it if total cost of ownership is the priority — the Octavia is the same car for less money.
2.0 TDI EA288 (B9, 2015–2023) — 69/100 ACCEPTABLE
The current-generation 2.0 TDI. Not affected by Dieselgate (different engine from the EA189). 150 or 190 hp, both adequate. The 190 hp version with quattro and S tronic is the sensible A4 for motorway commuters. Its weak points are cooling and emissions hardware: the EGR cooler, the intercooler built into the intake manifold, and AdBlue sensors — treat any unexplained coolant loss as a warning sign.
EA839 3.0 TFSI (S4 B9, 2016–2023) — 65/100 CAUTION
The S4 switched from a supercharged (B8) to a single-turbo V6 (B9). 354 hp and genuine sports saloon performance — a very different car from the standard A4, competing with the BMW 340i and Mercedes C43 AMG, not with the Passat. But the data has turned against it: Audi runs a piston-skirt warranty extension for knocking 3.0 V6 TFSI engines (model years 2018–2025; documented for US cars), engines built to about August 2018 can fail their rocker-arm bearings, and the coolant pump leaks. Get a VIN check, a cold-start noise check and a borescope inspection before buying.
When the A4 is worth it — and when it isn't
Worth the premium: B8.5 or B9 A4 with EA888 Gen 3 and quattro. The combination of proven engine, AWD, and genuinely better interior/chassis quality justifies paying more than a Passat. This is the A4 as Audi intended it.
Worth it with care: an A4 with the 3.0 V6 TDI. This engine doesn't exist in VW or Skoda models (or only in limited form), so you're paying for something unique — but at 68/100 (ACCEPTABLE) it needs a full service history, a cold-start check for chain or camshaft noise, and a budget for the rear timing chains. The B9 S4's 3.0 TFSI is unique too, but it scores lower still and needs the checks above.
Not worth the premium: B7/B8 A4 with the 2.0 TFSI EA113 or EA888 Gen 1/2. These are worse than the equivalent Golf/Passat engines in their respective generations, and the Audi premium makes the repair economics even more punishing.
Not worth the premium: B9 A4 1.4 TFSI. The Skoda Octavia or VW Passat 1.4 TSI offer 90% of the experience at 60% of the cost. Unless the badge is specifically what you're paying for, the VW Group alternatives are the smarter buy.