Parkers overall rating: 4.3 out of 5 4.3

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

Petrol engines 4.3 - 5.1 mpp
Plug-in hybrid petrol engines 11.2 - 15.1 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 20.2 - 23.9 mpg
Plug-in hybrid petrol engines 52.3 - 70.6 mpg
  • All models will be quite costly to run
  • E-Hybrid your best option all-round
  • Servicing and maintenance won’t be cheap

If you’re buying a Cayenne with an eye on running costs, head straight for the plug-in hybrid E-Hybrid. Porsche claims fuel economy of 60.1-70.6mpg and an electric driving range of 19-22 miles. You’ll need to be driving almost everywhere in electric mode to get near that claimed figure though, meaning you’ll need to be charging it at every opportunity. Otherwise it’ll be far closer to 20-30mpg.

The Turbo S E-Hybrid is similarly impressive with claimed economy of 52.3-57.5mpg and 19 miles of EV range, but as soon as you let that petrol engine start up, you’ll be achieving far less. Porsche claims the hybrids emit between 72 and 90g/km, the higher figure being for the more powerful model. It’s worth noting that the CO2 emissions Porsche claims are NEDC equivalent, and not WLTP.

For the rest of the range, the Cayenne Coupe offers up 22.2-23.9mpg and 212-215g/km of CO2, the Cayenne S claims 21.9-23.7mpg and 212-216g/km, and the Turbo just 20.2-20.8mpg and a sizeable 258-261g/km of CO2. As with the hybrids the mpg figures are all WLTP-compliant, but the CO2 emissions are not, meaning they could be even higher when retested.

Is it reliable?

  • Porsche has a good reputation
  • Three-year warranty included
  • Looks and feels very well built

Porsche has forged itself an enviable reputation as a car firm that builds high-quality cars that can be depended on, with great attention to detail.

This version of the Cayenne has been the subject of two recalls so far, one regarding software for the dials and another for the fuel filler. If you’re looking at a used model, any remedial work will have been carried out. Plus there’s a three-year warranty to keep your mind at ease. 

Ongoing running costs

Road tax (12 months) £465 - £475
Insurance group 45 - 50
How much is it to insure?