MENU
1 0 3 4 3 4

We are 103,000+ car owners sharing real-world car information.

Join Us

Mazda RX-8 vs. Acura RDX Fuel Economy (L/100km)

Chart is based on 202 fuel economy reports for the Mazda RX-8 and 252 fuel economy reports for the Acura RDX.

Mazda RX-8 L/100km

Mazda RX-8 Mazda RX-8 2010 13.9 MPG Highway Percentage 55 percent Mazda RX-8 Mazda RX-8 2009 13.5 MPG Highway Percentage 53 percent Mazda RX-8 Mazda RX-8 2008 11.3 MPG Highway Percentage 67 percent Mazda RX-8 Mazda RX-8 2007 12.9 MPG Highway Percentage 33 percent Mazda RX-8 Mazda RX-8 2007 10.8 MPG Highway Percentage 51 percent Mazda RX-8 Mazda RX-8 2006 12.8 MPG Highway Percentage 67 percent Mazda RX-8 Mazda RX-8 2006 13.6 MPG Highway Percentage 3 percent Mazda RX-8 Mazda RX-8 2005 13.1 MPG Highway Percentage 60 percent Mazda RX-8 Mazda RX-8 2004 13.8 MPG Highway Percentage 44 percent Mazda RX-8 Mazda RX-8 2004 13.7 MPG Highway Percentage 23 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 L/100km
2010 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med light 1 22 22 55 74 13.9  
2009 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med none 2 16 29 53 68 13.5  
2008 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med light 3 16 15 67 72 11.3  
2007 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med none 5 14 48 33 79 12.9  
2007 4dr Coupe 212-horsepower 1.3L R2
6-speed shiftable automatic RWD		 flat med light 15 24 10 51 78 10.8  
2006 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 flat med none 9 10 13 67 66 12.8  
2006 4dr Coupe 212-horsepower 1.3L R2
6-speed shiftable automatic RWD		 flat med light 5 28 65 3 60 13.6  
Looking for a warranty? Get a quote.
2005 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 flat med light 6 16 18 60 77 13.1  
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 flat med light 7 25 24 44 77 13.8  
2004 4dr Coupe 197-horsepower 1.3L R2
4-speed shiftable automatic RWD		 flat lead light 42 12 23 23 70 13.7  

Return to top

This page shows only averages. See all the Mazda RX-8 fuel economy data.

Acura RDX L/100km

Acura RDX Acura RDX 2014 8.1 MPG Highway Percentage 83 percent Acura RDX Acura RDX 2013 9.8 MPG Highway Percentage 66 percent Acura RDX Acura RDX 2012 11.8 MPG Highway Percentage 5 percent Acura RDX Acura RDX 2011 12.3 MPG Highway Percentage 30 percent Acura RDX Acura RDX 2010 10.6 MPG Highway Percentage 90 percent Acura RDX Acura RDX 2009 13.1 MPG Highway Percentage 40 percent Acura RDX Acura RDX 2008 12.6 MPG Highway Percentage 49 percent Acura RDX Acura RDX 2007 12.2 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 L/100km
2014 4dr SUV 273-horsepower 3.5L V6
6-speed shiftable automatic AWD		 hills med none 0 6 11 83 93 8.1  
2013 4dr SUV 273-horsepower 3.5L V6
6-speed shiftable automatic FWD		 flat light hvy 0 34 0 66 70 9.8  
2012 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic FWD		 flat light hvy 10 76 10 5 45 11.8  
2011 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 flat light light 9 28 33 30 67 12.3  
2010 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 mtns med none 5 3 3 90 60 10.6  
2009 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 flat med none 0 50 10 40 60 13.1  
2008 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 flat med light 5 26 20 49 69 12.6  
Looking for a warranty? Get a quote.
2007 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 flat light none 14 21 15 50 75 12.2  

Return to top

This page shows only averages. See all the Acura RDX fuel economy data.

Mazda RX-8 vs. Acura RDX Fuel Economy (L/100km)

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 Mazda RX-8 and Acura RDX's where a car was driven. So you can get an idea of their real-world L/100km based on how and where you drive a car.

See TrueDelta's information for all Coupes
See TrueDelta's information for all Mazda models and Acura models.

What Our Members Are Saying about the Real Gas Mileage of the Mazda RX-8

Mazda RX-8 Real Gas Mileage: Cons
YearBody/PowertrainComment
2009 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 One of the big downsides of the rotary is truly horrendous fuel economy. When the RX-8 first came out in the early 2000s, its mileage ratings of 16/22 city/highway mpg (stick shift) were just barely acceptable, but there days, with many crossovers hitting more than 30 mpg on the highway, those figures are truly atrocious, especially given respectable but certainly not neck-snapping power. Futhermore, it takes premium. If you're using the RX-8 as it commuter, fuel costs will add up quickly. In my predominantly around-town driving, I typically average between 16-17 mpg. My highest recorded average was 20 mpg on a highway trip at speeds around 75 mph. see full Mazda RX-8 review
2007 4dr Coupe 212-horsepower 1.3L R2
6-speed shiftable automatic RWD		 The EPA numbers are way low compared with my real-world experience. The window sticker showed 18/25 and I have never seen less than 23 with my 40/60 city/highway commute. I think Mazda should develop a lean-burn economy cruise mode for this car. see full Mazda RX-8 review
2006 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 Lite bit to high consumption when I drive it in normal speed. On full woot its ok. see full Mazda RX-8 review
2005 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 Worst fuel economy in its class. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 Not that bad for what it is, but it seems to me that Mazda's Sky Active technology could help the city mileage. It just needs more R&D. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 At 16 m.p.g. on premium grade these days it could be cheaper to take a taxi. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 For a small engine displacement and a relatively light vehicle weight, the gas mileage is weak. I usualy get around 19mpg, and that does not realy matter if I am doing all city or all highway driving. I think the real problem is in the sixth gear it isnt much different than fifth gear so it does not provide good fuel economy. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 For a car with a 1.9 liter engine I would have expected better than 16-19 MPG. Get your foot into it and the numbers fall drastically. Otherwise I loved that car. It just got too small with a newborn and a big dog. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 I gets 20MPG no matter what I do. Running around 20. 1/2 highway 20. All the highway all day 25-26. I think that it could do better. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 16-18MPG city, 24MPG highway see full Mazda RX-8 review
 

What Our Members Are Saying about the Real Gas Mileage of the Acura RDX

Acura RDX Real Gas Mileage: Cons
YearBody/PowertrainComment
2009 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 Turbo eats gas but provides for a fun ride see full Acura RDX review
2008 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 Low for a 4-cylinder see full Acura RDX review
2007 4dr SUV turbocharged 240hp 2.3L I4
5-speed shiftable automatic AWD		 I average around 20 MPG, but it is not an economy car - well worth it for the performance see full Acura RDX review