BMW 840i xDrive ConvertiblevsRolls-Royce Ghost Extended
BMW 840i xDrive Convertible leads in City MPG (21 vs 12) and Highway MPG (29 vs 19) and 3 more.
Fuel Economy
21
City MPG
12
29
Highway MPG
19
24
Combined MPG
14
Engine & Drivetrain
6
Cylinders
12
3
Engine Displacement
7
AWD
Drive Type
AWD
Automatic
Transmission
Automatic
Premium Gasoline
Fuel Type
Premium Gasoline
Emissions & Cost
373
CO₂ Emissions
609
2,900
Annual Fuel Cost
4,950
Subcompact Cars
Vehicle Class
Large Cars
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Data sourced from EPA Fuel Economy Data (Public Domain (U.S. Government)).