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View all Audi A4 reviews
Parkers overall rating: 4.5 out of 5 4.5
  • Full economy figures for 2019 A4 yet to be released
  • Diesels expected to be the most efficient models
  • Most of the updated range comes with mild hybrid technology

The entire A4 range will be complete later in 2019, with a full complement of diesels and petrols available. For now, there are rough estimates regarding fuel economy figures for some models. Previously, the most efficient were Ultra models of the 2.0-litre TDI engines, but these will have changed thanks to new engines and stricter testing regimes under WLTP.

For now, the 35 TDI is expected to return around 54mpg in its most efficient form, but higher-spec models with bigger wheels can see figures drop by around 4-5mpg. This is the case for most engines.

This should mean the 30 TDI could get closer to 60mpg, while the 40 TDI with Quattro should be around the late 40s mark.

At the other end of the TDI range, the S4 should be able to achieve around 40mpg, but only when you’re being sensible.

For the petrols, the 35 TFSI is expected to be the most efficient, returning around mid- to late 40s, while a 40 TFSI should be around 38-42mpg depending on the spec of the car.

Above this is the 45 TFSI, claiming around 36mpg.

As with fuel economy claims, CO2 emissions are yet to be officially confirmed, but a 40 TFSI is expected to emit 133-137g/km and the 45 TFSI around 155g/km.

For the diesels, the 35 TDI should be the best performer at a little over 100g/km, while a 40 TDI will be higher – up to around 140g/km for one fitted with Quattro.

We’ll fill this page with official figures once they’re made available.

2019 Audi A4 grille


  • Mixture of tried-and-tested and new engines for the A4
  • Audi generally has a reputable reliability record
  • Some recent Audis have suffered from electrical maladies

Dig back far enough and its history can be traced back to the 1972 Audi 80; 12 million examples later we’d expect Audi A4 Saloon reliability to be fine. After all this is as mainstream as Audi’s models get, so success is crucial to the car – and the last model suffered just two recalls, one for its airbags and another for its brakes.

The engines are a mix of all-new units and those seen elsewhere in the Volkswagen Group range, with no reported major issues, yet – these ones aren’t affected by the Dieselgate scandal.

Inside the cabin is constructed from solid and hard-wearing materials. Our only concern would surround the (optional) Virtual Cockpit system and the electrics involved, which saw some early Audi TT models experience occasional problems.

Estimated fuel cost per year

Fuel type Pence per litre Estimated cost per year *
Unleaded 128p £1,058 - £1,616 *
Diesel 131p £805 - £1,145 *

* The estimated fuel cost figure is based on an annual mileage of 10,000 miles and is a guide to how much this model will cost in fuel each year. It's calculated using the model's average MPG (calculated from both town centre and motorway driving) and the average fuel price from around the country. Actual fuel costs will vary based on driving style and road conditions.

Highest and lowest CO2 emissions

Engine CO2 emissions Road tax (12 months)
2.0 TDi (150ps) Diesel,
2.0 TDi Diesel
99 g/km (Min) £0 - £145
3.0T FSi (354ps) Petrol 174 g/km (Max) £235 - £465

Ongoing running costs

Road tax (12 months) £0 - £465
See tax rates for all versions
Insurance group 19 - 38
How much is it to insure?

Vehicle excise duty (VED) varies according to the CO2 emissions and the fuel type of the vehicle. For cars registered before 01 March 2001 it is based on engine size. For cars registered on or after 01 March 2001 the VED or road tax is based on the car's CO2 emissions.