Porsche Cayenne review – MPG and running costs
The removal of diesel engines does yield issues for everyday running costs, unless you go for the base e-hybrid and have a plug-point to tap into
The Cayenne is a large, petrol-powered and therefore thirsty vehicle no matter the specification. On the WLTP cycle, the base Cayenne’s 22-24mpg rating is hardly impressive, with the S and GTS dropping by a further 1mpg each. The Turbo is the least efficient at 20.2mpg on the combined cycle.
Plug-in hybrid models are much stronger on paper, with the standard e-hybrid showing between 76-91mpg on the official cycle, with the Turbo S e-hybrid’s rating between 68-74mpg. Like all plug-in hybrids however, unless you have consistent access to a charger and leave the car in its hybrid or EV modes, those figures will be impossible to match on the road.
Both hybrids have the same electric motor and 13.1kWh battery pack. Both should be capable of around 20 miles of low-speed driving on EV power alone, but once you slip back into relying on the petrol engines, things look very different. After a day of mixed driving on motorways and backroads, the Turbo S e-Hybrid slipped to nearly single digits once the electrical assistance had been used up.
The stark reality of running a big heavy SUV on such substantial hardware will also be pretty fierce once consumables like tyres, brake pads and bushes start wearing, but on the upside residual values are extremely strong, so it will retain an impressive amount of value to compensate.