Audi A6 Avant e-tron vs Audi S6 Avant e-tron

The Audi S6 Avant e-tron costs £23,225 more than the Audi A6 Avant e-tron. For that premium it adds 125 kW more power. The Audi A6 Avant e-tron is not just cheaper - it also offers 43 miles more WLTP range. On EVcarsguide's combined category scores, the Audi A6 Avant e-tron comes out ahead overall.

The Audi A6 Avant e-tron is £23,225 cheaper to buy. Running costs are almost identical - about £152 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Audi A6 Avant e-tron comes out roughly £23,345 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 364 miles for the Audi A6 Avant e-tron and 328 miles for the Audi S6 Avant e-tron - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Audi A6 Avant e-tron goes roughly 36 miles further between charging stops. Both rapid-charge to 80% in a similar time, around 21-21 minutes.

The Audi A6 Avant e-tron is the easier car for tight UK car parks: it is 36 mm narrower than the Audi S6 Avant e-tron. In a standard 2,400 mm bay that leaves about 513 mm of total clearance for the Audi A6 Avant e-tron and about 477 mm of total clearance for the Audi S6 Avant e-tron.

Over a 8-year ownership window EVcarsguide's degradation model projects roughly 84% battery health for the Audi A6 Avant e-tron and 84% for the Audi S6 Avant e-tron. 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.