BMW 840i ConvertiblevsPorsche Cayenne S
BMW 840i Convertible leads in City MPG (21 vs 16) and Highway MPG (29 vs 21) and 3 more.
Fuel Economy
21
City MPG
16
29
Highway MPG
21
24
Combined MPG
18
Engine & Drivetrain
6
Cylinders
8
3
Engine Displacement
4
RWD
Drive Type
AWD
Automatic
Transmission
Automatic
Premium Gasoline
Fuel Type
Premium Gasoline
Emissions & Cost
368
CO₂ Emissions
492
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)).