Parkers overall rating: 4.3 out of 5 4.3

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

Petrol engines 6.9 - 7.8 mpp
Diesel engines 7.1 - 10.2 mpp
Hybrid petrol engines 6.9 - 7.9 mpp
Hybrid diesel engines 7.7 - 8.0 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 32.1 - 36.7 mpg
Diesel engines 35.3 - 50.4 mpg
Hybrid petrol engines 32.1 - 37.2 mpg
Hybrid diesel engines 38.2 - 39.8 mpg
  • Fuel economy better than you might expect
  • Plug-in hybrid system most efficient
  • Diesels engines cheap to run

Either the 45 or 50 TDI are the (non-hybrid) engines to go for if you want to keep visits to the filling station infrequent – both claim the same fuel thirst and CO2 emissions, despite the latter being more powerful. On the smallest wheels available (19-inchers), Audi claims the diesel pair return up to 50.4mpg, while examples sitting on 20- or 21-inch rims can manage 48.7mpg if you’re careful.

The 55 TFSI is a little way behind, but still impressive when you consider it pushes out 340hp. Again, those with smaller wheels are more economical, with 40.4mpg achievable in the best case scenario, while the largest 21-inch models return up to 39.2mpg. Worst of all is the S7 Sportback with a promised 35.8mpg - which is reasonable for the performance it generates.

The Audi A7’s CO2 emissions are changeable based on the model and the size of the wheels fitted. It’s not as simple as one CO2 figure for a particular engine.

If you go for the 45 or 50 TDI in Sport spec, CO2 emissions are rated at 147g/km – the lowest in the range before the four-cylinder powertrains arrive. If you want this engine in S Line spec, CO2 emissions are slightly higher at 150g/km, due to the larger wheels.

For the 55 TFSI in Sport specification, the A7 emits 158g/km, while an S Line model produces 161g/km. Once again the S7 Sportback is the worst offender with 170g/km.

Plug-in hybrid efficiency

The 55 TFSI e plug-in hybrid is the most efficient - assuming you remember to plug it in. Official MPG is rated at 134, while its CO2 emissions are 46g/km. The battery-power will take the Audi around 25 miles on a charge, depending greatly on how fast you're going. During our testing at 70(ish)mph, it lasted around 20 miles.

This hybrid system is smooth and powerful (rated at 362hp) but has the same problems as every other plug-in. The chief of which is long journeys. After you've depleted the battery, you're essentially just lugging it around, which can reduce MPG. So while 134mpg is achievable on short journeys, on longer ones, expect more like 40-50mpg.

Reliability

  • Shouldn’t be too much to worry about
  • A lot of new technology on board, though
  • Some electrical glitches in our experience

Audi’s built a reputation for building high quality cars with beautifully built interiors and an overall feel of solidity, and the A7 fits this, at least on a superficial level. It feels substantial and secure, but that doesn’t necessarily mean it’ll be without fault.

There’s an awful lot of electronic trickery going on beneath the surface, and we’ve experienced a couple of warning lights regarding the Pre-Sense crash detection system and the adaptive lights. Similarly, we’ve tested the larger A8 with all the same systems and a series of warning lights for the safety systems has flashed up.

However, teething problems like this aren’t uncommon in a car with so much new tech, and an Audi dealer will sort out any issues like this under the car’s warranty. The core mechanical components are used elsewhere in the Audi range, and should last well without concern.

Ongoing running costs

Road tax (12 months) £140 - £475
Insurance group 40 - 50
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