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Audi RS6 review - MPG and running costs

Official economy in the low 20s, but capable of 30mpg on a cruise.

Evo rating
  • Pace, space, surprising agility and driver enjoyment
  • Air suspension blunts driver appeal; heavy; ceramic brakes pricey

Mild-hybrid technology and cylinder deactivation do their best to pull respectable fuel economy figures from an otherwise performance-orientated engine. They’re not magic though, so a combined figure of up to 22.8mpg is as high as you’re getting officially, and CO2 a minimum of 281g/km, putting it in the highest VED bracket.

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The reality might actually be better though. While the V8 will indeed slurp fuel when you’re using its full potential, we’ve found the RS6 surprisingly frugal on a longer run, achieving a nice round 30mpg on a recent trip from Northamptonshire to Yorkshire for a test. The cylinder deactivation kicks in quite frequently if you keep things steady, and a coasting function in the transmission allows the engine to kick out when you decelerate, starting up instantly when you prod the accelerator

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