Currently reading: Audi A4 long-term test review: final report
Is a V6 diesel still a tower of strength in a compact exec or a thirsty anachronism? Eight months in one has proved illuminating

A long-term test is always a great opportunity to really get to know a car, but just as important with the Audi A4 I’ve been running for the past eight months, it was a chance to see if six-cylinder engines have a future in mainstream models. 

It wasn’t so long ago that these engines accounted for a sizeable share of executive saloon sales, whereas today most have been swept from the road by a torrent of tax-friendly 2.0-litre four-pots. Our 3.0-litre V6 diesel A4, complete with its official combined fuel economy figure of 67.3mpg, seemed to have been engineered specifically to reverse this trend. 

A4 feb537

Putting things into perspective was the fact the car arrived immediately after we’d spent six months with the 2.0-litre diesel model that the majority of customers opt for.

Given that the 3.0-litre produces an extra 28bhp and develops its maximum torque lower in the rev range, it’s not exactly surprising that it feels more lively than the 2.0-litre. However, the 2.0 is still a strong performer, so it’s actually the superior refinement of the 3.0 that really sets it apart. You barely hear a whisper from it, even when accelerating hard, and almost no vibration reaches the cabin.

Don’t think that you pay heavily at the pumps for this smoothness and calm, either. We averaged 42.9mpg during our time with the 3.0-litre A4, compared with 44.8mpg for the 2.0-litre, and on long motorway runs, both would top 55mpg.

Audi a4 goodbye 426 

Add in the fact that you’ll have to find just £1720 more for the bigger engine if you’re buying privately – or £24 a month extra in company car tax – and it’s certainly the one that I’d choose. 

Ride comfort is another A4 strength and experience of other examples has shown that this remains the case even on larger wheels and without the Adaptive Comfort suspension (a £900 option) fitted to our car. 


Read our review

Car review

The Audi A4 zeroes in on efficiency, technology and quality - but is it enough to drive compact saloon buyers away from the BMW 3 Series and Mercedes-Benz C-Class?

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What’s more, only the BMW
 3 Series has an infotainment system that’s as intuitive and easy to use on the move. And even that is second best if you specify the A4 with the optional Virtual Cockpit (£450), which replaces the traditional instruments with a screen that can be configured to show a range of information directly in front of you. 

The materials in the A4 also impress – it feels extremely plush from carpet level upwards – and the crisp on-screen graphics and beautifully damped switchgear contribute to the sense that no expense has been spared. 

However, the build quality on our car wasn’t beyond reproach. After less than three months, its gearlever gaiter had come loose, revealing the mechanicals beneath. Although you could click it back into place, it quickly worked free again. 

Audi a4 lt 30th1790

Of course, this was far from 
the end of the world and is the
 sort of thing that could easily be fixed at a first service. But it was a little disappointing, given Audi’s reputation for quality and the general robustness on display elsewhere. 

Most of the time, I can get by 
with a two-seater, but at about the time the gearlever was first doing 
its striptease, practicality suddenly became a concern because my in-laws decided to fly in from Japan for the Goodwood Revival. Fortunately, Audi has built one of the bigger compact execs, so they had plenty of room in the back to stretch out. 

The only issue was that the boot wasn’t quite wide enough for their kimono bag, but we were able to run it down the spine of the car, thanks to the 40/20/40 split rear seats – a feature Audi fits as standard when most rivals charge extra. 

Audi a4 goodbye 432

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The car’s next big test came with the arrival of winter. I’ve never
been a huge fan of four-wheel drive in anything other than big SUVs, preferring the extra fun that comes with rear-wheel drive or the lower running costs of front-wheel drive. But 215bhp is quite a lot to send to the front end of any car without a clever differential to help it transfer its power to the road. 

Sure enough, it did become quite easy to spin the wheels when pulling away, but the period during which this was a problem was so short that I’d still argue quattro is something you can do without unless you live in a place where it often snows. 

What I would change about our car’s spec if I could is the dual-clutch S tronic gearbox. This might shift smoothly at higher speeds, but it can be a bit jerky and hesitant in town, which is a real pain at busy junctions. Either a manual or a conventional auto ’box would be preferable, but neither is available. 

Audi a4 goodbye 420

Returning to the original question, I’d have to say that Audi has shown six-cylinder engines definitely deserve a mainstream future, but the continued sales dominance of four- pots – even in the A4 – mean that it’s unlikely we’ll see rival premium brands rushing to introduce their own super-frugal (and smooth) sixes. 

Even without such engines, 
the 3 Series, Jaguar XE and Alfa Romeo Giulia are all better choices if you value sharp handling and
an entertaining drive. However, if comfort, refinement and a first-rate infotainment system are your top priorities, I’d argue that this A4 is the best car of its kind.


Comfort and Sound Pack £1500, Technology Pack £1450, leather and Alcantara upholstery £1150, Adaptive Comfort suspension £900, Tango Red paint £645, Audi Virtual Cockpit £450, Parking System Plus £395, 17in Parallel Spoke alloy wheels £260 


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Claimed economy 67.3mpg (combined) Fuel tank
  54 litres
 Test average
 42.9mpg Test best â€¨55.4mpg Test worst 36.3mpg Real-world range 509 miles 


0-62mph 6.6sec Top speed â€¨155mph
 2967cc, V6, diesel Max power  215bhp at 4000rpm Max torque  295lb ft at 1250rpm Transmission  7-spd dual-clutch auto Boot  480 litres
 Wheels 7.5x17in Tyres Continental SportContact 3 225/50 R17
  Weight 1540kg 


Contract hire rate £433.95 per month CO2 
109g/km Service costs â€¨None
 Other costs 50 pence (tyre inflation) Fuel costs
 £1184 Running costs inc fuel £1184.50 Cost per mile â€¨13 pence
 £13,448 Cost per mile inc dep’n â€¨£1.60 Faults Loose gearlever trim


I’ve never been a huge fan of four-wheel drive in anything other than big SUVs.

I can see the appeal if you live somewhere that regularly gets snow, but for the conditions generally found in the south of England, I’ve always felt that I’d rather have the extra fun that comes with rear-wheel drive or the lower running costs of front-wheel drive.

I didn’t give it a second thought, then, when the decision was made to specify our long-term Audi A4 as a non-quattro car. Why wouldn’t we have the extra 5.9mpg and the accompanying 10g/km reduction in CO2 emissions that drops it two company car tax bands?

Throughout my first six months with the A4, nothing came along to cause me to reconsider; I just got on with enjoying the effortless performance and superb refinement provided by its 3.0-litre V6 diesel engine, and never found the car wanting for traction. 

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A4 feb538

However, when it's cold I’ve started to find it hard to pull out of busy junctions without spinning the front wheels.

Perhaps I shouldn’t be surprised; a full 215bhp is quite a lot to send to the front end of any car, but particularly one without a clever diff to help it transfer its power to the road. And the S tronic dual-clutch automatic gearbox doesn’t help, because its tendency to be slow to respond from a standstill can make it hard to judge how much throttle is needed.

You could go for the 2.0-litre diesel model, which has a more manageable 187bhp, but then you’d be missing out on one of the great executive car engines. So on reflection, the A4 is one car where I really would be tempted to specify four-wheel drive and put up with the slightly higher running costs.

At £1430, the premium for quattro isn’t huge. And you still get more than 60mpg on the combined cycle, meaning you can expect around 40mpg from it in the real world.

Steve Huntingford

Read our previous reports here:

From London to Blackpool

As an Autocar reviewer, swapping from vehicle to vehicle is part of my job, and I rarely get to stay in any one car for an extended period.

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I’m not complaining about having a cornucopia of cars to drive, but it can be nice to get off the treadmill and just ‘live’ with something for a bit. Certain models make this more desirable than others, but when I needed wheels for a week in Wales (and a spur-of-the-moment blast to Blackpool) with my friend Ellen and her daughter Georgi, I was happy to bag the long-term Audi A4 for the trip.

Its velvety 3.0-litre V6 diesel engine supplies the sort of effortless speed that makes all the difference when you have the best part of 1000 miles to cover. And yet without really trying to drive economically, we averaged 55mpg on the motorway.

Audi a4 lt 30th1788

The rolling refinement at 70mph was just as impressive, with the A4 suppressing road noise and vibration better than most rival compact execs. Indeed, few large executive saloons are as smooth or quiet; the only reason we had to raise our voices was to make ourselves heard over the excellent Bang & Olufsen stereo.

Being a style-conscious teenager, Georgi loved the swishness of the cabin and the array of gadgets, including the Virtual Cockpit digital instruments and wireless phone charging dock. However, most of the features she picked out cost extra, and I doubt she would have been so impressed with a bog-standard A4.

Ellen, meanwhile, was happy lounging in the rear, but she was sitting behind Georgi; if a fourth person had been forced to sit behind my 6ft frame, they would probably have been less cheerful.

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To sum up, the A4 was all things to all men – or one man and two women. But the fact that the right options have been ticked was key.


Price £34,700 Price as tested £41,450 Economy 48.2mpg Faults None Expenses Tyre inflation 50p Last seen 9.11.16

Read our previous reports:

First report

Interior niggles

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Overdrive 14 August 2017

Autocar wrote:

Autocar wrote:

....Audi has built one of the bigger compact execs....

Talk about an oxymoron.

Rather pointless calling the likes of the A4 'compact' exes, seeing as they get markedly bigger with each new generation.

NY_69 14 August 2017

78 mph on the odometer!

I do hope that photo was taken on a track or the German autobahn as such high speeds are illegal in the UK...


on a aeeioua note good to see a review which normal people car read and consider. Look forward to the return of bigg(ish petrols. 

Jimbbobw1977 7 July 2017

This 3.0v6 TDI A4 has the

This 3.0v6 TDI A4 has the same amount of torque of 400 as my Mondeo 2.0tdci 177bhp poweshift - and no I don't have problems with wheel spin in the cold or wet. Only time it will spin in the wet is flooring it.