Audi RS e-tron GT vs Audi S6 Avant e-tron

The Audi RS e-tron GT costs £32,500 more than the Audi S6 Avant e-tron. For that premium it adds 50 kW faster peak rapid charging, 225 kW more power and a 1.1s quicker 0-62mph time. The Audi S6 Avant e-tron is not just cheaper - it also offers 26 miles more WLTP range, 97 litres more boot space and 1 more seat (5 versus 4). On EVcarsguide's combined category scores, the Audi S6 Avant e-tron comes out ahead overall.

The Audi S6 Avant e-tron is £32,500 cheaper to buy. Running costs are almost identical - about £176 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Audi S6 Avant e-tron comes out roughly £32,580 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 306 miles for the Audi RS e-tron GT 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 S6 Avant e-tron goes roughly 22 miles further between charging stops. Both rapid-charge to 80% in a similar time, around 18-21 minutes.

The Audi S6 Avant e-tron is the easier car for tight UK car parks: it is 41 mm narrower than the Audi RS e-tron GT. In a standard 2,400 mm bay that leaves about 477 mm of total clearance for the Audi S6 Avant e-tron and about 436 mm of total clearance for the Audi RS e-tron GT. The Audi RS e-tron GT also turns in a 0.7 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 RS e-tron GT 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.