The S5's V8 is 98 RON with 95 RON allowable with reduced performance. I tend to keep it filled with Optimax or Tesco 99 wherever I can. Oddly (in my opinion), the RS 6 specifies 95 RON or 91 RON with reduced performance, so Audi are obviously moving away from high-octane fuel requirement.4.2 BiTurbo V8 (450 Hp) quattro Tiptronic : Start of production : April, 2002 year : End of production : September, 2004 year : Powertrain Architecture : Internal Combustion engine : Body type: Sedan : Seats : 5 : Doors : 4 : Performance specs; Fuel consumption (economy) - urban : 21.8 l/100 km 10.79 US mpg 12.96 UK mpg 4.59 km/l: Fuel
Top speed is limited by 250 km/h (155 mph). The engine has a Euro 4 standard. Fuel tank capacity is 90 liters. Consumption in city is 17,5 lt/100km, consumption in highway is 8,7 lt/100km and combined fuel consumption is 11,9 lt/100km according to official factory data. Estimated A8 Long 4.2i V8 real World MPG/consumption is 20,6 lt/100km.
The V8 is coupe-only, while the supercharged V6 is limited to the coupe; The 2010 Audi S5 combined fuel economy ranges from 17 mpg to 20 mpg. Products.
Highway MPG: 30. highway. 4.2 gals/ 100 miles. 2022 Audi S5 Cabriolet 6 cyl, 3.0 L, Automatic (S8) Premium Gasoline. Not Available.See 2024 Audi S5 for Sale. 4.6. Expert Rating. 24 MPG. especially in the turbo V8 models. See Details. With a combined fuel economy of 29 MPG, the 2023 MAZDA MX-5 Miata RF is the most fuelAdZPtDX.