• Diesel the cheapest to run non-hybrid A3
• High-forties possible from the petrol
• Hybrid models can keep running costs low

What are the running costs?

You’ll need the plug-in hybrid Audi A3 TFSIe and its 88 mile electric range for the cheapest potential running costs, but we cover that in a separate review. The 35 TDI is, of course, the most efficient of the non-hybrid A3s. The WLTP figures show it can manage 57mpg, however we achieved over 63mpg with an S Line-spec example in a week of mostly A-road and motorway driving.

Both the 30 TFSI and 35 TFSI petrol engines with the Sport trim officially return around 50mpg with a manual gearbox, and 53mpg with an automatic thanks to the mild hybrid tech. The bigger wheels of other models knock those figures back a bit. Even so, mid-forties and up mpg is possible even with S Line trim.

The old 1.0-litre 30 TFSI petrol also posts 50mpg manual, 53mpg automatic fuel consumption, while the 40 TFSI manages about 40mpg. The 30 TDI could achieve as much as 60mpg, the 40 TDI reaches more like 50mpg.

Servicing and warranty

Premium brands like Audi generally charge more for servicing than the likes of Ford and Vauxhall. But you can spread the cost of maintaining an A3 by getting one of Audi’s service plans.

The standard warranty lasts for an industry-standard three years or 60,000 miles. Extended warranties are available, but you still get longer coverage from the likes of Hyundai, Kia and Toyota.

Reliability

• Shares platform with the VW Golf
• Largely an update of the previous A3
• Tech used across the VW Group

The fourth-generation Audi A3 is, to all intents and purposes, a heavily updated version of the third-gen iteration. As such, its platform, engines and tech are very well proven – not just in the A3 but across a vast number of VW Group cars.

Audi generally has a pretty good reputation for reliability among premium brands, though such brands tend to do worse in owner satisfaction surveys than their mainstream counterparts. Curiously. However, our owners’ reviews suggest that A3 owners get on with their cars very well.

There have been some recalls issued for this generation of A3, but the kinks seem to have been ironed out, now. If you’re looking at a used example, go through its service history to make sure any recall work has been carried out, or contact a dealer. Outstanding recalls are listed on the MOT certificate of any A3 that’s more than three years old.