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Mercedes-Benz SL vs. Audi A8 / S8 MPG

Chart is based on 8 fuel economy reports for the Mercedes-Benz SL and 28 fuel economy reports for the Audi A8 / S8.

Mercedes-Benz SL MPG

Mercedes-Benz SL Mercedes-Benz SL 2013 23.4 MPG Highway Percentage 48 percent Mercedes-Benz SL Mercedes-Benz SL 2007 21.0 MPG Highway Percentage 30 percent Mercedes-Benz SL Mercedes-Benz SL 2006 18.0 MPG Highway Percentage 5 percent Mercedes-Benz SL Mercedes-Benz SL 2000 19.1 MPG Highway Percentage 35 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 MPG
2013 2dr Hardtop conv. turbocharged 429hp 4.7L V8
7-speed shiftable automatic RWD		 flat light hvy 6 9 37 48 75 23.4  
2007 2dr Hardtop conv. 382-horsepower 5.5L V8
7-speed shiftable automatic RWD		 hills light none 10 10 50 30 70 21.0  
2006 2dr Hardtop conv. 302-horsepower 5.0L V8
7-speed shiftable automatic RWD		 flat med none 0 5 90 5 60 18.0  
2000 2dr Hardtop conv. 302-horsepower 5.0L V8
5-speed automatic RWD		 flat med none 15 20 30 35 60 19.1  

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

Audi A8 / S8 MPG

Audi A8 / S8 Audi A8 / S8 2014 17.5 MPG Highway Percentage 22 percent Audi A8 / S8 Audi A8 / S8 2012 17.9 MPG Highway Percentage 50 percent Audi A8 / S8 Audi A8 / S8 2011 20.4 MPG Highway Percentage 36 percent Audi A8 / S8 Audi A8 / S8 2009 20.0 MPG Highway Percentage 100 percent Audi A8 / S8 Audi A8 / S8 2008 19.1 MPG Highway Percentage 35 percent Audi A8 / S8 Audi A8 / S8 2008 15.0 MPG Highway Percentage 45 percent Audi A8 / S8 Audi A8 / S8 2007 26.7 MPG Highway Percentage 80 percent Audi A8 / S8 Audi A8 / S8 2007 19.5 MPG Highway Percentage 29 percent Audi A8 / S8 Audi A8 / S8 2005 18.0 MPG Highway Percentage 38 percent Audi A8 / S8 Audi A8 / S8 2005 18.4 MPG Highway Percentage 52 percent Audi A8 / S8 Audi A8 / S8 2004 18.3 MPG Highway Percentage 66 percent Audi A8 / S8 Audi A8 / S8 2001 16.5 MPG Highway Percentage 13 percent Audi A8 / S8 Audi A8 / S8 2000 19.3 MPG Highway Percentage 67 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 MPG
2014 4dr Sedan, ext. turbocharged 420hp 4.0L V8
8-speed shiftable automatic AWD		 flat med light 17 0 61 22 75 17.5  
2012 4dr Sedan, ext. 372-horsepower 4.2L V8
8-speed shiftable automatic AWD		 flat med hvy 0 50 0 50 65 17.9  
2011 4dr Sedan 372-horsepower 4.2L V8
8-speed shiftable automatic AWD		 flat med hvy 12 14 39 36 68 20.4  
2009 4dr Sedan 350-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat light none 0 0 0 100 75 20.0  
2008 4dr Sedan, ext. 350-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat med none 5 30 30 35 70 19.1  
2008 4dr Sedan 350-horsepower 4.2L V8
6-speed shiftable automatic AWD		 hills lead hvy 5 40 10 45 70 15.0  
2007 4dr Sedan, ext. 350-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat med hvy 5 5 10 80 75 26.7  
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2007 4dr Sedan 350-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat med none 7 34 30 29 88 19.5  
2005 4dr Sedan, ext. 330-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat lead hvy 23 15 25 38 60 18.0  
2005 4dr Sedan 330-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat med light 8 31 10 52 68 18.4  
2004 4dr Sedan, ext. 330-horsepower 4.2L V8
6-speed shiftable automatic AWD		 flat med light 8 11 15 66 74 18.3  
2001 4dr Sedan 360-horsepower 4.2L V8
5-speed shiftable automatic AWD		 flat med light 38 38 13 13 60 16.5  
2000 4dr Sedan 310-horsepower 4.2L V8
5-speed shiftable automatic AWD		 flat light light 12 8 14 67 60 19.3  

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This page shows only averages. See all the Audi A8 / S8 fuel economy data.

Mercedes-Benz SL vs. Audi A8 / S8 MPG

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 SL and Audi A8 / S8's where a car was driven. So you can get an idea of their real-world MPG 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 SL

Mercedes-Benz SL Real Gas Mileage: Pros
YearBody/PowertrainComment
2006 2dr Hardtop conv. supercharged 493hp 5.4L V8
5-speed shiftable automatic RWD		 Awful! Big V-8 gets approximately 14 mpg, if I'm lucky! see full Mercedes-Benz SL review
Mercedes-Benz SL Real Gas Mileage: Cons
YearBody/PowertrainComment
2002 2dr Hardtop conv. 302-horsepower 5.0L V8
5-speed automatic RWD		 Not great. I averaged about 16mpg in around town driving, about 22 on the freeways. Best mileage observed was in Wyoming, 24.5, coming downhill eastbound from the Grand Tetons. that said, people shouldn't buy this car expecting a Miata, in any way other than Two Doors and a Convertible Top. see full Mercedes-Benz SL review
 

TrueDelta Reviews the Real Gas Mileage of the Audi A8 / S8

Audi A8 / S8 Real Gas Mileage: Pros
YearComment
2013 Fuel economy might seem an odd, "why to buy" for such a large, powerful car. But this large powerful car manages EPA ratings of 18 mpg city, 28 mpg highway, each one mpg better than the superceded V8. In suburban driving the trip computer typically reported averages in the low 20s, but as high as 25.5. We're a long way from large luxury sedans that had trouble cracking 18. The BMW is rated a bit higher, 19/28, but this is close enough to call it a draw. If you want even better fuel economy, Audi how also offers a 240-horsepower diesel with EPA ratings of 24/36. But the TDI is only available with the long wheelbase and will also cost you another $3,700. BMW offers no comparable car on this side of the Atlantic. see full Audi A8 / S8 review
 

What Our Members Are Saying about the Real Gas Mileage of the Audi A8 / S8

Audi A8 / S8 Real Gas Mileage: Pros
YearBody/PowertrainComment
2004 4dr Sedan, ext. 330-horsepower 4.2L V8
6-speed shiftable automatic AWD		 The Audi A8L is an interesting car if bought used. As it is a premium model, it is often bought on lease or by rich people. It is also all aluminium - when sold they are usually in great condition. The fuel economy is good for its size - about 12 miles a gallon city and 22 highway. For an 8 cylinder, all wheel drive performance car this is not bad. However high gas prices make it nota very economic choice for the gas version. With the introduction of the diesel version means used vehicles will come onto th eused market in about three years (2106). Fuel consumption will be better. see full Audi A8 / S8 review