Skip advert
Advertisement

Audi A4 2.0 TDI S line

We see if subtle updates can keep classy saloon in contention

The Audi A4 has played second fiddle to the BMW 3 Series for years, so is it time for the tables to be turned? With tweaked looks, revised engines and an uprated chassis, the latest car seems to have what it takes.

There wasn’t much wrong with the styling of the previous A4 – as demonstrated by the subtle nature of this facelift. You’ll need a magnifying glass and a comprehensive knowledge of the old model to spot the changes.

Advertisement - Article continues below

For the record, they include new bumpers, revised headlamps and a reshaped grille. In sporty S line trim, you also get xenon headlamps, LED rear lights, side skirts, lowered suspension and 18-inch alloys.

The A4 looks understated and smart beside its rivals, but badge appeal is what attracts buyers in this class, and the Audi still has plenty of upmarket clout. Cabin quality is a traditional strong point, and the new car doesn’t disappoint. It’s full of high-quality material and kit. All trims have Bluetooth, three-zone climate control and cruise control as standard, and S line adds part-leather sports seats and a multifunction steering wheel.

Interior space is on a par with the BMW, so the A4 leaves the Mercedes C-Class trailing for rear legroom. It’s also the only one of our trio to feature useful split-folding rear seats as standard equipment.

Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

Used - available now

Tiguan

2024 Volkswagen

Tiguan

51,949 milesManualPetrol1.5L

Cash £14,268
View Tiguan
ID.3

2024 Volkswagen

ID.3

14,929 milesAutomaticElectric

Cash £17,997
View ID.3
Kona Electric

2023 Hyundai

Kona Electric

39,890 milesAutomaticElectric

Cash £15,299
View Kona Electric
A1 Sportback

2026 Audi

A1 Sportback

22,502 milesAutomaticPetrol1.0L

Cash £21,499
View A1 Sportback

The engine line-up consists of no fewer than four different 2.0-litre diesels, including eco-tuned 134bhp and 161bhp TDIe variants aimed at cutting CO2 emissions. They’re not available in S line spec, though, so if you want the sportiest trim in the range, you’ll have to opt for either the 141bhp version or the 175bhp engine fitted to our test model.

Advertisement - Article continues below

The most powerful 2.0-litre diesel emits 120g/km of CO2 – the same as the slightly more powerful BMW engine. But the A4 isn’t in the same performance league as the 320d. While its torque output of 380Nm is identical to the BMW’s, the Audi trailed in all but one of our tests against the clock. We recorded our figures using a slightly heavier Avant estate model, yet that doesn’t account for the large disparity in performance between the cars.

The Audi’s 8.4-second 0-60mph time was 1.1 seconds slower than the BMW’s. In the sprint from 50-70mph in sixth, it trailed the 3 Series by a full second, with a time of 9.7 seconds. Still, the Audi was comfortably quicker than the Mercedes across the board and its diesel engine can teach the BMW’s a thing or two about smoothness and refinement at low revs.

Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

The A4 was noticeably quieter than the 320d at idle and when pulling away from a standstill, while its stop-start system was also much smoother. That makes the Audi the pick of the three cars tested here for town driving.

Or at least it would if it weren’t for our test model’s S line suspension. This firmer set-up lowers the car by 20mm and hurts ride comfort. The A4 jars at low speeds as it crashes into potholes, and at higher speeds it thumps noisily over motorway expansion joints and cat’s eyes. This really takes the sheen off the car’s otherwise very impressive refinement.

But it’s not all bad news for the Audi: its powerful and confidence-inspiring brakes were the best on test, and its light gearshift action and grippy chassis are other dynamic highlights.

Unfortunately, any hopes that this revised A4 had of competing with the 320d on twisty back roads are dashed by the new electric power-steering set-up. This system has been introduced to help reduce fuel consumption, but it feels slow and lifeless. It takes the fun out of the experience, so the 3 Series is still the default choice for keen drivers.

While the A4 is now better than ever before, the upgrades haven’t really gone far enough and it faces an uphill battle to take the overall honours in this test.

Details

Chart position: 2
WHY: A raft of cosmetic and mechanical updates aims to propel the classy and beautifully built Audi A4 to the top of this highly competitive class.

Skip advert
Advertisement

New & used car deals

Omoda 5

Omoda 5

RRP £24,040Avg. savings £1,761 off RRP*Used from £17,895
Kia Sportage

Kia Sportage

RRP £28,085Avg. savings £3,442 off RRP*Used from £12,690
Dacia Spring

Dacia Spring

RRP £11,990Avg. savings £703 off RRP*Used from £10,000
Toyota Yaris Cross
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

New Volvo XC60 PHEV boasts a whopping 124 miles of EV range
Volvo XC60 facelift 2026 - Ellis Hyde

New Volvo XC60 PHEV boasts a whopping 124 miles of EV range

The Volvo XC90 also gets the new plug-in hybrid powertrain, with the large SUV capable of 99 miles of pure electric range
News
15 Sep 2026
New Volkswagen ID.3 GTI: the most powerful GTI ever has arrived
Volkswagen ID.3 GTI - front

New Volkswagen ID.3 GTI: the most powerful GTI ever has arrived

Rear-wheel drive, over 320bhp and a new GTI-mode bring the fire to VW’s ID.3 Neo
News
16 Sep 2026
Car Deal of the Day: super 373-mile Skoda Enyaq is a bargain for under £300 a month
Skoda Enyaq front tracking

Car Deal of the Day: super 373-mile Skoda Enyaq is a bargain for under £300 a month

The Skoda Enyaq is easily one of the best electric SUVs money can buy. It’s our Deal of the Day for 15 September
News
15 Sep 2026