Audi S8vsPorsche Cayenne Turbo GT
Audi S8 leads in Highway MPG (24 vs 20) and Combined MPG (18 vs 17) and 2 more.
Fuel Economy
15
City MPG
15
24
Highway MPG
20
18
Combined MPG
17
Engine & Drivetrain
8
Cylinders
8
4
Engine Displacement
4
AWD
Drive Type
AWD
Automatic
Transmission
Automatic
Premium Gasoline
Fuel Type
Premium Gasoline
Emissions & Cost
502
CO₂ Emissions
521
3,850
Annual Fuel Cost
4,050
Large Cars
Vehicle Class
Standard Sport Utility Vehicle 4WD
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Data sourced from EPA Fuel Economy Data (Public Domain (U.S. Government)).