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BMW 6-Series vs. Buick Century Fuel Economy (km/L)

Chart is based on 11 fuel economy reports for the BMW 6-Series and 19 fuel economy reports for the Buick Century.

BMW 6-Series km/L

BMW 6-Series BMW 6-Series 2014 42.3 MPG Highway Percentage 74 percent BMW 6-Series BMW 6-Series 2008 43.0 MPG Highway Percentage 27 percent BMW 6-Series BMW 6-Series 2006 89.5 MPG Highway Percentage 75 percent BMW 6-Series BMW 6-Series 2005 39.4 MPG Highway Percentage 15 percent BMW 6-Series BMW 6-Series 2005 45.9 MPG Highway Percentage 60 percent BMW 6-Series BMW 6-Series 2004 8.8 MPG Highway Percentage 70 percent BMW 6-Series BMW 6-Series 2004 10.2 MPG Highway Percentage 100 percent
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd km/L
2014 2dr Coupe turbocharged 445hp 4.4L V8
8-speed shiftable automatic RWD		 flat lead light 5 11 11 74 70 42.3  
2008 2dr Convertible 360-horsepower 4.8L V8
6-speed shiftable automatic RWD		 flat light hvy 45 9 18 27 60 43.0  
2006 2dr Convertible 255-horsepower 3.0L I6
6-speed manual RWD		 flat med none 3 20 3 75 72 89.5  
2005 2dr Coupe 325-horsepower 4.4L V8
6-speed shiftable automatic RWD		 flat lead light 10 35 40 15 60 39.4  
2005 2dr Coupe 325-horsepower 4.4L V8
6-speed manual RWD		 flat lead hvy 0 0 40 60 80 45.9  
2004 2dr Coupe 325-horsepower 4.4L V8
6-speed shiftable automatic RWD		 flat lead hvy 0 10 20 70 120 8.8  
2004 2dr Coupe 325-horsepower 4.4L V8
6-speed manual RWD		 flat med none 0 0 0 100 120 10.2  

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This page shows only averages. See all the BMW 6-Series fuel economy data.

Buick Century km/L

Buick Century Buick Century 2003 58.5 MPG Highway Percentage 33 percent Buick Century Buick Century 2002 53.5 MPG Highway Percentage 88 percent Buick Century Buick Century 2001 8.5 MPG Highway Percentage 52 percent
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd km/L
2003 4dr Sedan 175-horsepower 3.1L V6
4-speed automatic FWD		 flat light light 0 21 46 33 68 58.5  
2002 4dr Sedan 175-horsepower 3.1L V6
4-speed automatic FWD		 flat lead none 3 8 3 88 68 53.5  
2001 4dr Sedan 175-horsepower 3.1L V6
4-speed automatic FWD		 flat light none 0 48 0 52 72 8.5  

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This page shows only averages. See all the Buick Century fuel economy data.

BMW 6-Series vs. Buick Century Fuel Economy (km/L)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the BMW 6-Series and Buick Century's where a car was driven. So you can get an idea of their real-world km/L based on how and where you drive a car.

See TrueDelta's information for all Coupes and Convertibles.
See TrueDelta's information for all BMW models and Buick models.

What Our Members Are Saying about the Real Gas Mileage of the BMW 6-Series

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What Our Members Are Saying about the Real Gas Mileage of the Buick Century

Buick Century Real Gas Mileage: Pros
YearBody/PowertrainComment
2003 4dr Sedan 175-horsepower 3.1L V6
4-speed automatic FWD		 Very good highway over 30 mpg see full Buick Century review