Parkers overall rating: 4.6 out of 5 4.6

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

Petrol engines 6.2 - 10.1 mpp
Diesel engines 7.8 - 11.2 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 29.1 - 47.1 mpg
Diesel engines 38.7 - 55.4 mpg
  • Efficient suite of non-hybrid engines
  • Driving aids reduce consumption and stress
  • Strong residuals and low-cost leases

Fuel economy is good across the board with only the most powerful petrol engines dipping below 40mpg. Claimed figures do vary with wheel size, however. You can aim for 51.4mpg with the 2.0-litre TFSI 190hp, while the 252hp version claims 45.6mpg - following on is the S5 with 36.7mpg. Most impressive petrol version on paper is the 1.4 TFSI with a claimed 53.3mpg At the top end of the range is the RS 5, which offers a claimed 32.5mpg. In the real-world, you'll be hard-pressed to see much above 25mpg.

The least powerful diesel is the most efficient, with up to 70.6mpg claimed for the 190hp 2.0-litre TDI Ultra Sport S Tronic on standard 17-inch alloy wheels, while the 218hp V6 3.0-litre TDI comes in at a respectable 61.4mpg. An impressive balance of power an economy comes with the 286hp version of the V6 which official tests claim returns 51.4mpg. Again, figures experienced out of lab conditions are more likely to be in the mid-40s mpg-wise.

Company car drivers will want to look at the 2.0-litre TDI Ultra 190hp which produces just 105g/km of CO2, but even the entry-level V6 3.0-litre TDI is reasonable with 119g/km. Go for the 286hp Quattro and you’ll enjoy a 5.2 second 0-62mph time with just 143g/km of CO2 emitted.

The 2.0-litre TFSI petrol engine comes in at 117g/km and 136g/km of CO2 for the 190hp and 252hp versions respectively, compared with the 3.0-litre S5’s 166g/km. Impressively, the RS 5 comes in at 197g/km, which may make it less than appealing for some tax scenarios but shows the progress made over the previous generation model.

On the lower-power models wheel choice can make a small difference to emissions, so check your chosen specification is in the right band or meets your own expectations of environmental friendliness.

Reliability

  • Fit and finish is excellent
  • Longevity of technology still an unknown
  • Most engines proven to be reliable

This is an important car for Audi, so you can be sure it’s been designed and built to the highest order. It also shares a lot of kit with other vehicles in the Volkswagen Group, from drivetrains to interior components, so you can buy with confidence. As with the A4, our only concern would be surrounding the Virtual Cockpit system and some of the electrics, which proved problematic in some early Audi TT models.

The Audi RS 5 uses a mixture of Porsche and Audi running gear. There’s no reason to believe it will be less reliable than other models of A5, but it may be less tolerant of neglect. As a high performance model, expect it to be more expensive for consumables such as brake pads, discs and tyres.

Ongoing running costs

Road tax (12 months) £20 - £475
See tax rates for all versions
Insurance group 25 - 49
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