Audi A8 quattrovsPorsche 911 Carrera S
Audi A8 quattro leads in City MPG (19 vs 17) and Highway MPG (27 vs 24) and 3 more.
Fuel Economy
19
City MPG
17
27
Highway MPG
24
22
Combined MPG
20
Engine & Drivetrain
6
Cylinders
6
3
Engine Displacement
3
AWD
Drive Type
RWD
Automatic
Transmission
Automatic
Premium Gasoline
Fuel Type
Premium Gasoline
Emissions & Cost
414
CO₂ Emissions
445
3,150
Annual Fuel Cost
3,450
Large Cars
Vehicle Class
Minicompact Cars
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Data sourced from EPA Fuel Economy Data (Public Domain (U.S. Government)).