MG S6 EV vs Porsche Cayenne

The Porsche Cayenne costs £45,205 more than the MG S6 EV. For that premium it adds 29 miles more WLTP range, 240 kW faster peak rapid charging and 107 litres more boot space. The MG S6 EV is not just cheaper - it also offers lower energy use, 166 versus 221 Wh/km. On EVcarsguide's combined category scores, the Porsche Cayenne comes out ahead overall.

The MG S6 EV is £45,205 cheaper to buy. The MG S6 EV is cheaper to charge, roughly £184 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 MG S6 EV comes out roughly £45,485 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 232 miles for the MG S6 EV and 234 miles for the Porsche Cayenne - effectively matched, and both well below their WLTP figures because sustained high speed is the hardest case for an EV.

The MG S6 EV is the easier car for tight UK car parks: it is 68 mm narrower than the Porsche Cayenne. In a standard 2,400 mm bay that leaves about 488 mm of total clearance for the MG S6 EV and about 420 mm of total clearance for the Porsche Cayenne. The MG S6 EV also turns in a 1.6 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 MG S6 EV 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.