Parkers overall rating: 4 out of 5 4.0

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

Petrol engines 3.7 - 5.8 mpp
Diesel engines 4.7 - 6.8 mpp
Plug-in hybrid petrol engines 18.8 - 20.9 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.
Based on "Weighted" mpg; figures depend on the proportion of miles driven in pure electric mode and may vary widely

Fuel economy

Petrol engines 28.0 - 43.5 mpg
Diesel engines 37.7 - 55.4 mpg
Plug-in hybrid petrol engines 141.2 - 156.9 mpg
  • All engines should prove to be economical
  • Diesel a low-volume seller, but most frugal
  • Mild-hybrid petrol makes its debut

The Sportback range kicks off with the 35 TFSI, with these WLTP-tested models rated at 39.8-41.5mpg with CO2 outputs of 132-137g/km, while the 45 TFSI Quattro S Tronic auto is 31.4-32.1mpg and 171-174g/km.

We expect the diesels to cost the least to run, even cheaper than the 35 TFSI with the mild-hybrid system. The 35 TDI in manual form (but with Quattro) returns 40.4-42.2mpg, but CO2 emissions are higher than petrols at 176-183g/km. The front-wheel drive S Tronic models are more efficient, returning up to 46.3-47.9mpg and 155-160g/km of CO2.

Unsurprisingly, the RS Q3 consumes the most fuel with a claimed 27.7-28.8mpg, and CO2 output of 223-231g/km. We managed to reach 31mpg on the motorway, but this dropped very quickly to 22mpg when using all the performance available. Fuel tank capacity is 63 litres.

A plug-in hybrid badged TFSI e arrived in 2021, offering a 13kWh battery and up to 28 miles of electric range. 

Other running costs will be similar to SUV versions of the Q3, meaning common sense has to be applied: the larger the alloy wheels, the more expensive the tyres; the more powerful the engine, the greater the fuel consumption and likely insurance costs.

Is it reliable?

  • Good reputation for reliability
  • Much of the tech already tried and tested
  • Solid construction using plush materials

It’s far too early to know for sure how reliable the Q3 Sportback will prove to be, but given that much of the technology appears across the vast Volkswagen Group suite of models – not just the SUV version of the Q3 – chances are that there won’t be significant maladies. All Q3 models come with a three-year, 60,000-mile warranty to cover you in the first few years of ownership.

Ongoing running costs

Road tax (12 months) £165 - £520
Insurance group 23 - 42
How much is it to insure?