Kia EV9 vs Porsche Cayenne

The Porsche Cayenne costs £16,555 more than the Kia EV9. For that premium it adds 180 kW faster peak rapid charging, 448 litres more boot space and 175 kW more power. The Kia EV9 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 Kia EV9 is £16,555 cheaper to buy. The Kia EV9 is cheaper to charge, roughly £192 a year versus £240 for the Porsche Cayenne, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Kia EV9 comes out roughly £16,795 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 291 miles for the Kia EV9 and 234 miles for the Porsche Cayenne - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Kia EV9 goes roughly 57 miles further between charging stops.

The two are within 0 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 Kia EV9 and about 420 mm of total clearance for the Porsche Cayenne. The Kia EV9 also turns in a 0.4 m tighter circle, which helps with U-turns and multi-storey ramps.

Over a 8-year ownership window EVcarsguide's degradation model projects roughly 89% battery health for the Kia EV9 and 84% for the Porsche Cayenne. That gives the Kia EV9 a modest edge in retained real-world range. Both use NMC-type cells, so for daily use keep the charge limit near 80% to slow degradation.