BMW 840i xDrive CoupevsPorsche Cayenne GTS
BMW 840i xDrive Coupe leads in City MPG (21 vs 15) and Highway MPG (29 vs 22) and 3 more.
Fuel Economy
21
City MPG
15
29
Highway MPG
22
24
Combined MPG
18
Engine & Drivetrain
6
Cylinders
8
3
Engine Displacement
4
AWD
Drive Type
AWD
Automatic
Transmission
Automatic
Premium Gasoline
Fuel Type
Premium Gasoline
Emissions & Cost
373
CO₂ Emissions
512
2,900
Annual Fuel Cost
3,850
Subcompact Cars
Vehicle Class
Standard Sport Utility Vehicle 4WD
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Data sourced from EPA Fuel Economy Data (Public Domain (U.S. Government)).