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Pontiac G5 vs. Porsche Cayman MPG

Chart is based on 89 fuel economy reports for the Pontiac G5 and 20 fuel economy reports for the Porsche Cayman.

Pontiac G5 MPG

Pontiac G5 Pontiac G5 2009 33.5 MPG Highway Percentage 32 percent Pontiac G5 Pontiac G5 2009 32.0 MPG Highway Percentage 70 percent Pontiac G5 Pontiac G5 2008 25.9 MPG Highway Percentage 37 percent Pontiac G5 Pontiac G5 2008 27.1 MPG Highway Percentage 75 percent Pontiac G5 Pontiac G5 2008 28.4 MPG Highway Percentage 68 percent Pontiac G5 Pontiac G5 2008 24.8 MPG Highway Percentage 67 percent Pontiac G5 Pontiac G5 2007 29.7 MPG Highway Percentage 53 percent Pontiac G5 Pontiac G5 2007 25.9 MPG Highway Percentage 61 percent Pontiac G5 Pontiac G5 2007 28.9 MPG Highway Percentage 28 percent Pontiac G5 Pontiac G5 2007 29.4 MPG Highway Percentage 70 percent Pontiac G5 Pontiac G5 2006 24.4 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 MPG
2009 2dr Coupe 155-horsepower 2.2L I4
5-speed manual FWD		 flat light none 5 52 12 32 63 33.5  
2009 2dr Coupe 155-horsepower 2.2L I4
4-speed automatic FWD		 flat light none 0 30 0 70 60 32.0  
2008 2dr Coupe 171-horsepower 2.4L I4
5-speed manual FWD		 flat med light 2 54 7 37 96 25.9  
2008 2dr Coupe 171-horsepower 2.4L I4
4-speed automatic FWD		 flat light none 7 18 0 75 75 27.1  
2008 2dr Coupe 148-horsepower 2.2L I4
5-speed manual FWD		 hills med light 6 16 12 68 90 28.4  
2008 2dr Coupe 148-horsepower 2.2L I4
4-speed automatic FWD		 flat med none 6 26 1 67 111 24.8  
2007 2dr Coupe 173-horsepower 2.4L I4
5-speed manual FWD		 flat lead none 4 20 23 53 75 29.7  
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2007 2dr Coupe 173-horsepower 2.4L I4
4-speed automatic FWD		 hills med none 6 12 20 61 74 25.9  
2007 2dr Coupe 148-horsepower 2.2L I4
5-speed manual FWD		 flat med none 5 50 18 28 98 28.9  
2007 2dr Coupe 148-horsepower 2.2L I4
4-speed automatic FWD		 flat light none 0 0 30 70 70 29.4  
2006 2dr Coupe 145-horsepower 2.2L I4
5-speed manual FWD		 flat med light 2 2 47 50 115 24.4  

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This page shows only averages. See all the Pontiac G5 fuel economy data.

Porsche Cayman MPG

Porsche Cayman Porsche Cayman 2008 21.8 MPG Highway Percentage 44 percent Porsche Cayman Porsche Cayman 2008 25.5 MPG Highway Percentage 75 percent Porsche Cayman Porsche Cayman 2007 21.0 MPG Highway Percentage 5 percent Porsche Cayman Porsche Cayman 2007 22.5 MPG Highway Percentage 45 percent Porsche Cayman Porsche Cayman 2007 22.3 MPG Highway Percentage 50 percent Porsche Cayman Porsche Cayman 2006 19.8 MPG Highway Percentage 47 percent Porsche Cayman Porsche Cayman 2006 18.5 MPG Highway Percentage 15 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
2008 2dr Hatch 295-horsepower 3.4L H6
6-speed manual RWD		 flat med light 10 31 15 44 69 21.8  
2008 2dr Hatch 245-horsepower 2.7L H6
5-speed manual RWD		 flat med light 0 0 25 75 70 25.5  
2007 2dr Hatch 295-horsepower 3.4L H6
6-speed manual RWD		 flat med light 0 0 95 5 60 21.0  
2007 2dr Hatch 295-horsepower 3.4L H6
5-speed shiftable automatic RWD		 flat med hvy 25 25 5 45 70 22.5  
2007 2dr Hatch 245-horsepower 2.7L H6
5-speed manual RWD		 hills med light 0 14 36 50 73 22.3  
2006 2dr Hatch 295-horsepower 3.4L H6
6-speed manual RWD		 flat lead none 14 15 24 47 70 19.8  
2006 2dr Hatch 295-horsepower 3.4L H6
5-speed shiftable automatic RWD		 flat med none 0 85 0 15 60 18.5  

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This page shows only averages. See all the Porsche Cayman fuel economy data.

Pontiac G5 vs. Porsche Cayman 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 Pontiac G5 and Porsche Cayman'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 Coupes and Sedans.
See TrueDelta's information for all Pontiac models and Porsche models.

What Our Members Are Saying about the Real Gas Mileage of the Pontiac G5

Pontiac G5 Real Gas Mileage: Pros
YearBody/PowertrainComment
2009 2dr Coupe 155-horsepower 2.2L I4
5-speed manual FWD		 best for non-hybrid gasoline see full Pontiac G5 review
2008 2dr Coupe 171-horsepower 2.4L I4
5-speed manual FWD		 For a performance model very well average 22-23 mpg city see full Pontiac G5 review
2008 2dr Coupe 148-horsepower 2.2L I4
5-speed manual FWD		 24/33 for the manual transmission are pretty good fuel economy numbers. I beat the highway numbers on a long trip by a few points if I keep it at 65 mph (a/c on). see full Pontiac G5 review
2008 2dr Coupe 148-horsepower 2.2L I4
5-speed manual FWD		 once broken in and done properlly, and driven with the engine in its proper spot for efficiency in its powerband, its a great fuel efficient car that has tons of power to surprise! see full Pontiac G5 review
2008 2dr Coupe 171-horsepower 2.4L I4
5-speed manual FWD		 The Ecotech engine is one of the most economical on the road today. see full Pontiac G5 review
2008 2dr Coupe 171-horsepower 2.4L I4
5-speed manual FWD		 I drove fast, all the time, and still averaged 28mpg. see full Pontiac G5 review
2007 2dr Coupe 173-horsepower 2.4L I4
5-speed manual FWD		 my G5 is great on gas i put 93 in it and i get 28.6 mpg all city no highway. you cant ask for anything better. the power this car has and great gas miles its the best of both worlds. see full Pontiac G5 review
2007 2dr Coupe 148-horsepower 2.2L I4
5-speed manual FWD		 Very good economy even when driving it hard. see full Pontiac G5 review
2007 2dr Coupe 173-horsepower 2.4L I4
5-speed manual FWD		 The G5 blends the mileage and power that I was looking for in a car that would do primary duty for commuting to work and back. Was looking to get 30-33 mpg. see full Pontiac G5 review
 

What Our Members Are Saying about the Real Gas Mileage of the Porsche Cayman

Porsche Cayman Real Gas Mileage: Pros
YearBody/PowertrainComment
2008 2dr Hatch 295-horsepower 3.4L H6
6-speed manual RWD		 It is better than I expected. I average roughly 23 miles with city and highway commuting on days I choose to take it to the office. On trips I can get 26 mpg, not stellar but not awful. see full Porsche Cayman review
2008 2dr Hatch 295-horsepower 3.4L H6
6-speed manual RWD		 Fuel economy is reasonable relative to the car's performance - 20 mpg, plus or minus a couple depending on the balance of city versus highway driving. see full Porsche Cayman review
Porsche Cayman Real Gas Mileage: Cons
YearBody/PowertrainComment
2007 2dr Hatch 295-horsepower 3.4L H6
6-speed manual RWD		 It sucks if you are driving the car correctly. On the slab I can see 26 mpg. see full Porsche Cayman review