Porsche Cayenne vs Tesla Model X

The Porsche Cayenne costs £1,150 more than the Tesla Model X. For that premium it adds 120 miles more WLTP range, 270 kW faster peak rapid charging and 42 kW more power. The Tesla Model X is not just cheaper - it also offers 2 more seats (7 versus 5). On EVcarsguide's combined category scores, the Porsche Cayenne comes out ahead overall.

The Tesla Model X is £1,150 cheaper to buy. Running costs are almost identical - about £240 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Tesla Model X comes out roughly £1,150 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 234 miles for the Porsche Cayenne and 171 miles for the Tesla Model X - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Porsche Cayenne goes roughly 63 miles further between charging stops.

The two are within 19 mm on width, so neither is meaningfully easier to thread into a tight space. In a standard 2,400 mm bay that leaves about 420 mm of total clearance for the Porsche Cayenne and about 401 mm of total clearance for the Tesla Model X.

Over a 8-year ownership window EVcarsguide's degradation model projects roughly 84% battery health for the Porsche Cayenne and 84% for the Tesla Model X. 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.