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Mercedes-Benz SLK vs. Audi A5 / S5 / RS5 Fuel Economy (km/L)

Chart is based on 18 fuel economy reports for the Mercedes-Benz SLK and 141 fuel economy reports for the Audi A5 / S5 / RS5.

Mercedes-Benz SLK km/L

Mercedes-Benz SLK Mercedes-Benz SLK 2009 9.3 MPG Highway Percentage 70 percent Mercedes-Benz SLK Mercedes-Benz SLK 2009 49.4 MPG Highway Percentage 50 percent Mercedes-Benz SLK Mercedes-Benz SLK 2008 59.9 MPG Highway Percentage 80 percent Mercedes-Benz SLK Mercedes-Benz SLK 2007 41.4 MPG Highway Percentage 68 percent Mercedes-Benz SLK Mercedes-Benz SLK 2006 55.0 MPG Highway Percentage 85 percent Mercedes-Benz SLK Mercedes-Benz SLK 2006 58.0 MPG Highway Percentage 60 percent Mercedes-Benz SLK Mercedes-Benz SLK 2005 54.6 MPG Highway Percentage 53 percent Mercedes-Benz SLK Mercedes-Benz SLK 2005 56.5 MPG Highway Percentage 90 percent Mercedes-Benz SLK Mercedes-Benz SLK 2003 61.7 MPG Highway Percentage 79 percent Mercedes-Benz SLK Mercedes-Benz SLK 2001 59.6 MPG Highway Percentage 50 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
2009 2dr Hardtop conv. 355-horsepower 5.4L V8
7-speed shiftable automatic RWD		 flat med light 0 10 20 70 100 9.3  
2009 2dr Hardtop conv. 300-horsepower 3.5L V6
7-speed shiftable automatic RWD		 flat med hvy 0 5 45 50 65 49.4  
2008 2dr Hardtop conv. 268-horsepower 3.5L V6
7-speed shiftable automatic RWD		 mtns lead light 5 5 10 80 75 59.9  
2007 2dr Hardtop conv. 228-horsepower 3.0L V6
7-speed shiftable automatic RWD		 flat med none 13 13 8 68 95 41.4  
2006 2dr Hardtop conv. 355-horsepower 5.4L V8
7-speed shiftable automatic RWD		 flat light light 2 10 3 85 70 55.0  
2006 2dr Hardtop conv. 228-horsepower 3.0L V6
7-speed shiftable automatic RWD		 flat med hvy 10 10 20 60 70 58.0  
2005 2dr Hardtop conv. 268-horsepower 3.5L V6
7-speed shiftable automatic RWD		 flat med light 10 25 12 53 66 54.6  
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2005 2dr Hardtop conv. 268-horsepower 3.5L V6
6-speed manual RWD		 flat lead none 0 0 10 90 75 56.5  
2003 2dr Hardtop conv. supercharged 192hp 2.3L I4
5-speed shiftable automatic RWD		 flat med light 0 5 16 79 72 61.7  
2001 2dr Hardtop conv. 215-horsepower 3.2L V6
5-speed shiftable automatic RWD		 flat med light 1 15 35 50 63 59.6  

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This page shows only averages. See all the Mercedes-Benz SLK fuel economy data.

Audi A5 / S5 / RS5 km/L

Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2013 64.5 MPG Highway Percentage 66 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2012 57.5 MPG Highway Percentage 29 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2011 36.8 MPG Highway Percentage 30 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2011 45.6 MPG Highway Percentage 70 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2011 60.0 MPG Highway Percentage 50 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2010 58.1 MPG Highway Percentage 33 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2010 9.1 MPG Highway Percentage 70 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2010 29.1 MPG Highway Percentage 55 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2009 47.7 MPG Highway Percentage 62 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2009 62.4 MPG Highway Percentage 23 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2008 20.0 MPG Highway Percentage 100 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2008 11.3 MPG Highway Percentage 43 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2008 36.6 MPG Highway Percentage 24 percent Audi A5 / S5 / RS5 Audi A5 / S5 / RS5 2008 57.6 MPG Highway Percentage 32 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
2013 2dr Coupe turbocharged 211hp 2.0L I4
8-speed shiftable automatic AWD		 flat med light 0 0 34 66 75 64.5  
2012 2dr Coupe turbocharged 211hp 2.0L I4
6-speed manual AWD		 flat med light 5 16 50 29 66 57.5  
2011 2dr Coupe 354-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat med light 10 30 30 30 75 36.8  
2011 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD		 hills light light 3 8 20 70 73 45.6  
2011 2dr Convertible turbocharged 211hp 2.0L I4
8-speed shiftable CVT FWD		 flat light none 20 10 20 50 70 60.0  
2010 2dr Coupe turbocharged 211hp 2.0L I4
6-speed manual AWD		 flat lead none 9 11 47 33 72 58.1  
2010 2dr Coupe 354-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat med hvy 10 10 10 70 120 9.1  
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2010 2dr Convertible supercharged 333hp 3.0L V6
7-speed automated manual AWD		 hills med none 0 5 40 55 88 29.1  
2009 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD		 flat med none 0 17 22 62 67 47.7  
2009 2dr Coupe 265-horsepower 3.2L V6
6-speed manual AWD		 flat med light 10 28 40 23 68 62.4  
2008 2dr Coupe turbocharged 240hp 3.0L V6 Diesel
6-speed manual AWD		 flat light light 0 0 0 100 100 20.0  
2008 2dr Coupe turbocharged 170hp 1.8L I4
6-speed manual FWD		 flat med light 13 18 28 43 160 11.3  
2008 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD		 flat lead none 1 14 60 24 73 36.6  
2008 2dr Coupe 265-horsepower 3.2L V6
6-speed shiftable automatic AWD		 flat med hvy 20 24 24 32 80 57.6  

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This page shows only averages. See all the Audi A5 / S5 / RS5 fuel economy data.

Mercedes-Benz SLK vs. Audi A5 / S5 / RS5 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 Mercedes-Benz SLK and Audi A5 / S5 / RS5'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 Convertibles
See TrueDelta's information for all Mercedes-Benz models and Audi models.

What Our Members Are Saying about the Real Gas Mileage of the Mercedes-Benz SLK

Mercedes-Benz SLK Real Gas Mileage: Cons
YearBody/PowertrainComment
2005 2dr Hardtop conv. 355-horsepower 5.4L V8
7-speed shiftable automatic RWD		 clearly AMG was not thinking gas mileage at all when they built this engine see full Mercedes-Benz SLK review
 

What Our Members Are Saying about the Real Gas Mileage of the Audi A5 / S5 / RS5

Audi A5 / S5 / RS5 Real Gas Mileage: Pros
YearBody/PowertrainComment
2013 2dr Coupe turbocharged 211hp 2.0L I4
8-speed shiftable automatic AWD		 Mileage seems to have leveled out at about 27 mpg with a 60/40 mix of highway and suburban driving. On longer trips, it has been as high as 30 mpg while driving a steady 75 mph. see full Audi A5 / S5 / RS5 review
2010 2dr Coupe turbocharged 211hp 2.0L I4
6-speed manual AWD		 Averaging 9L/100KM, without feeling too conservative. see full Audi A5 / S5 / RS5 review
Audi A5 / S5 / RS5 Real Gas Mileage: Cons
YearBody/PowertrainComment
2011 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD		 I knew what gas mileage the S5 got long before I stepped onto the dealer lot. Still, I get 24 mpg on a full highway run. see full Audi A5 / S5 / RS5 review
2009 2dr Coupe turbocharged 170hp 2.0L I4 Diesel
6-speed manual AWD		 Fuel economy is fair when going for a long ride, the car is AWD and heavy. I did however expect a somewhat lower fuel consumption when driving short-distance. see full Audi A5 / S5 / RS5 review
2008 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD		 It is not great, and if you have fun with the car, you will get less than 15MPG see full Audi A5 / S5 / RS5 review
2008 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD		 drinks too fast when driving is more aggressive see full Audi A5 / S5 / RS5 review
2008 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD		 Thirsty V8 coupled with a car that was born to be driven hard equals mid-teen MPG in mostly non-highway driving. see full Audi A5 / S5 / RS5 review