Audi's RS6 Avant meets the Mercedes-AMG E63 S on the track yet again to see which is quickest. Ingolstadt's finest rocks up with 441 kW and 800 N.m from its 4,0-litre V8 petrol twin-turbo engine which is down on power in comparison to the E63's 450 kW and 850 N.m. The Mercedes also has a weight advantage by virtue of being around 200 kg lighter than the Audi. It's a classic showdown, 2020 Audi RS6 vs 2020 Mercedes E63s. Who will take the victory?

CAR Magazine editor Ray Leathern and journalist Sean Parker put these animals through their paces on Killarney International Raceway in Cape Town, South Africa. 

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