BMW 840i ConvertiblevsPorsche Cayenne Coupe
BMW 840i Convertible leads in City MPG (21 vs 17) and Highway MPG (29 vs 23) and 3 more.
Fuel Economy
21
City MPG
17
29
Highway MPG
23
24
Combined MPG
19
Engine & Drivetrain
6
Cylinders
6
3
Engine Displacement
3
RWD
Drive Type
AWD
Automatic
Transmission
Automatic
Premium Gasoline
Fuel Type
Premium Gasoline
Emissions & Cost
368
CO₂ Emissions
469
2,900
Annual Fuel Cost
3,650
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)).