When comparing the Pontiac G6's and the Pontiac G8's specifications and ratings, the Pontiac G6 has the advantage in the areas of typical lower range of pricing for one- to five-year-old used cars, and fuel efficiency. The Pontiac G8 has the advantage in the areas of interior volume and base engine power. Based on this comparison of the Pontiac G6's and the Pontiac G8's specifications and ratings, the two cars are fairly comparable.
Pontiac G6 vs. Pontiac G8 Pricing
A used 2009 Pontiac G6 ranges from $3,206 to $9,994 while a used 2009 Pontiac G8 is priced between $5,998 to $39,567.
Engine Power and Fuel Efficiency Comparison
For engine performance, the Pontiac G6’s base engine makes 164 horsepower, and the Pontiac G8 base engine makes 256 horsepower. The G6 is rated to deliver an average of 25 miles per gallon, with a highway range of 480 miles. The G8 is rated to deliver an average of 20 miles per gallon, with a highway range of 475 miles. This gives the Pontiac G6 the fuel efficiency and maximum range advantage over the Pontiac G8. Both models use gasoline.
Passenger Space Comparison
The Pontiac G8 has the advantage of offering more interior volume, reflected in more front shoulder room, rear head room, rear shoulder room, rear leg room, and cargo space. The Pontiac G6 has the advantage in the area of front head room. The Pontiac G6 and Pontiac G8 are comparable in regards to front leg room.