Audi e-tron vs Porsche Cayenne

The Porsche Cayenne costs £23,300 more than the Audi e-tron. For that premium it adds 149 miles more WLTP range, 270 kW faster peak rapid charging and 121 litres more boot space. On EVcarsguide's combined category scores, the Porsche Cayenne comes out ahead overall.

The Audi e-tron is £23,300 cheaper to buy. Running costs are almost identical - about £232 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Audi e-tron comes out roughly £23,340 cheaper overall. These figures cover list price and home charging only - insurance, servicing, tyres and depreciation will move the real total.

EVcarsguide estimates a real-world motorway range of about 174 miles for the Audi e-tron and 234 miles for the Porsche Cayenne - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Porsche Cayenne goes roughly 60 miles further between charging stops.

The Audi e-tron is the easier car for tight UK car parks: it is 45 mm narrower than the Porsche Cayenne. In a standard 2,400 mm bay that leaves about 465 mm of total clearance for the Audi e-tron and about 420 mm of total clearance for the Porsche Cayenne. The Audi e-tron also turns in a 0.5 m tighter circle, which helps with U-turns and multi-storey ramps.

Over a 8-year ownership window EVcarsguide's degradation model projects roughly 84% battery health for the Audi e-tron and 84% for the Porsche Cayenne. That is close enough that capacity loss should not decide between them. Both use NMC-type cells, so for daily use keep the charge limit near 80% to slow degradation.