Porsche 911 review - MPG and running costs
Expect MPG in the low 30s on a cruise, and a tank range of 350-400 miles
Figures for the standard Carrera sit between 26mpg and 29mpg on the WLTP cycle, with the Carrera S capable of a combined 25-28mpg. All-wheel-drive models don't represent a huge drop considering the additional driveline components.
Those figures are actually quite realistic, as you’d hope from the WLTP test. A touring figure of 30-35mpg certainly isn’t out of reach in our experience, though it’s worth mentioning that for all the supposed economy and emissions benefits of turbocharged engines, we achieved much the same figures with similar ease from the old naturally aspirated models. Extend the flat-six and the numbers will drop, but with a 64-litre fuel tank (67 litres in the 4S) you can expect a tank range of 350-400 miles.
The 992 isn’t generally featured in wide-ranging reliability or ownership surveys, but Porsche as a brand has come first in terms of overall customer satisfaction in the Driver Power Survey for two years running. There also hasn’t been any stories of nightmare powertrain faults (early adopters of the 991.1 GT3 know what we’re talking about), but some electrical gremlins have been noted from owners we've spoken to.
It's also worth noting Porsches are generally expensive to both buy and run. Aside from fuel, consumables such as tyres and brakes are expensive to replace, and they’ll need it, while general servicing and maintenance is also at the high end.