Parkers overall rating: 3.9 out of 5 3.9

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 7.3 - 11.8 mpp
Diesel engines 11.4 - 13.3 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 34.4 - 55.4 mpg
Diesel engines 56.5 - 65.7 mpg
  • Fuel economy and CO2 figures are very competitive
  • Expect improvements over the old car
  • Mild-hybrid assistance will help keep running costs low

The best performer is the manual 30 TDI, with 111g/km of CO2 and 65.7mpg on offer if you pick Technik trim, while these figures drop a bit with the larger wheeled S Line model. It should be noted that in a week's real-word testing of the 35 TDI in S Line trim, we averaged 63.5mpg in day-to-day driving, based mostly on A-roads and motorway, with little in-town running.

Petrol performance isn't quite as good, with 124g/km of CO2 and 52.3mpg from the best version - again in Technik trim. We've yet to sample the petrol model over a significant distance, but when we do, we'll report back our findings. There's also the addition of mild-hybrid technology to the petrol range on the 150hp 1.5-litre petrol model, claiming 50.4mpg and 128g/km.

As for the hot S3, Audi claims 35.3mpg and 183g/km, making it the thirstiest and most emitting model of A3.


  • Shares a platform with VW Golf
  • Largely a update of the existing car
  • Tech used across the VW Group

Given that this is, in all reality, a heavy update of the outgoing car you shouldn't have too much to worry about in terms of the fundamental structure or tech in this A3.

The engines are improved versions of what came before too, and used across the VW Group, although the mild-hybrid tech isn't as well tested (by customers at least) as the rest of the range.

Ongoing running costs

Road tax (12 months) £150
Insurance group 17 - 34
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