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Audi A3 (2013-2020) review - MPG, CO2 and Running Costs

Audi offers plug-in hybrid A3s to keep costs down, but watch out for expensive insurance on some models

MPG, CO2 and Running Costs rating

4.2

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RRP
£29,505 £52,480
Avg. savings
£3,576 off RRP*
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An A3 diesel is the most sensible choice if efficiency is your main priority. The 148bhp 2.0-litre 35 TDI (in entry SE Technik trim and with a manual gearbox) manages a claimed 56.5mpg and CO2 emissions of 131g/km. The 181bhp 40 TDI (in S line trim and a manual ‘box) is less efficient thanks to its increased performance, with 44.8mpg and 165g/km. Note that these figures are for the Sportback model; other bodystyles and trim levels see marginal fluctuations as a result of weight, wheel size and drivetrain differences.

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Petrol engines are usually a lot less frugal, but the 1.0-litre unit in the 30 TFSI (with a manual gearbox) is nearly as economical as the lower-powered diesel and is nicer to drive, too – combined fuel economy of 49.6mpg is claimed in entry trim, along with 128g/km.

Our real-world choice is the 1.6-litre 30 TDI with a manual gearbox, which returns a claimed 51.4mpg and 143g/km. It's less refined than the 1.0-litre petrol, but for many the economy figures alone will be enough to make the difference.

Insurance groups

An equivalent BMW 1 Series or VW Golf will be cheaper to insure, as the Audi A3 falls into at least insurance group 16. Surprisingly, though, the RS 3 doesn’t sit in the highest insurance group in the A3 range; that dubious honour goes to the S3 Cabriolet (group 42). The RS 3 sits in insurance group 40.

Whether you go for one of the performance models or a lower-spec diesel, Audi offers a wealth of electronic safety assist systems and quattro all-wheel drive on the A3, much of which will help lower insurance premiums.

Depreciation

The Audi A3 is quite a bit more expensive to buy than a Ford Focus or Volkswagen Golf, but decent standard equipment, the brand’s perceived quality and strong residual values help to counter the higher initial outlay.

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Which Is Best

Cheapest

  • Name
    1.5 TFSI 116 Sport 5dr
  • Gearbox type
    Manual
  • RRP
    £29,505
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Most Economical

  • Name
    1.5 TFSI e 204 Sport 5dr S Tronic
  • Gearbox type
    Semi-auto
  • RRP
    £39,180
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Fastest

  • Name
    S3 TFSI Quattro 333 Black Edition 5dr S Tronic
  • Gearbox type
    Semi-auto
  • RRP
    £46,740
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Audi A3

Audi A3

RRP £26,295Avg. savings £3,576 off RRP*Used from £11,895
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