Pontiac G8 Pontiac G8 2008

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Pontiac G8 Specs at TrueDelta: Powertrains and tires by trim level (2008)

How powerful is the engine? How much room is in the back seat? Get the 2008 Pontiac G8 specs.

Looking to trade in your vehicle? Get an estimate of how much it's worth.

2008 Pontiac G8 Specs - Exterior and Interior Dimensions

Body 4dr Sedan
Wheelbase 114.8 in
Length 196.1 in
Width 74.8 in
Height 57.7 in
Curb Weight 3855 lb.
Fuel Capacity 19.0 gal.
Headroom, Row 1 38.7 in
Shoulder Room, Row 1 59.1 in
Hip Room, Row 1 56.7 in
Legroom, Row 1 42.2 in
Headroom, Row 2 38.0 in
Shoulder Room, Row 2 59.1 in
Hip Room, Row 2 58.0 in
Legroom, Row 2 39.4 in
Total Legroom 81.6 in (over 2 rows)
Cargo Volume 17.5 ft3

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What Our Members Are Saying about the Seat Room and Comfort of the 2008 Pontiac G8

2008 Pontiac G8 Seat Room and Comfort: Pros
YearBody/PowertrainComment
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Tons of legroom, and I mean TONS of legroom see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Tons of room for the family. This is a true full-size sedan. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
The seat fits my smaller frame and has comfortable padding and bolsters. The headrest is in the right place. Power controls are convenient. see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed shiftable automatic RWD
When I go places with my friends, I actaully like sitting in the back! The back seats are sooo comfortable. see full Pontiac G8 review
2009 4dr Sedan 256-horsepower 3.6L V6
5-speed shiftable automatic RWD
Even with front seats completely back, there is enough leg room for rear passengers. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Extremely comfortable backseat, although serious hump in the center eliminates almost all leg room for center seat. Four in comfort all day long, large armrest, good visibility forward and to the side. Nice support, split folding seats and cargo passthru see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed manual RWD
Fantastic seats. see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed shiftable automatic RWD
Huge back seat, and very comfortable, even for two adults and a child seat. see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed shiftable automatic RWD
Plenty of room, good support, and do not have to squirm much on a 6 hour drive. see full Pontiac G8 review
2008 Pontiac G8 Seat Room and Comfort: Cons
YearBody/PowertrainComment
2008 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Cannot get comfortable - ever. Hurts my lower back after just 15 mins. I have the leather seats w/ premium package. No lateral support/bolstering either. Lumbar support useless. see full Pontiac G8 review
 

2008 Pontiac G8 4-door Sedan Specs - Powertrains and Tire Sizes

Trim Base GT
Standard Engine 3.6L V6
DOHC-4v
256 hp@6300
248 lb-ft@2100
6.0L V8
OHV-2v
361 hp@5300
385 lb-ft@4400
Standard Transmission5-speed manually-shiftable automatic6-speed manually-shiftable automatic
Standard DrivetrainRWDRWD
Standard Tires245/45VR18 tires245/45VR18 tires
Optional Tires 245/40WR19 tires

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What Our Members Are Saying about the Powertrain of the 2008 Pontiac G8

2008 Pontiac G8 Powertrain: Pros
YearBody/PowertrainComment
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Lots of Power. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Smooth and fast power delivery. GOBS of torque from off the line. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
A fast "thirsty" engine when you need it, BUT also an efficient 25mpg cruiser on the highway (thanks to AFM) when just coasting along! see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Its like a Corvette with 4 doors. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
This thing is brutally fast. It accelerates with ease, and you always feel like you have torque to spare, even at highway speeds and in normal shifting mode. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Strong and smooth. The Sport and manumatic tranny options are a big plus. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
The 361 horspower, going thru a 6 speed auto to rear wheel drive! Lots of get up and go but with reasonable fuel mileage if you drive reasonably. see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed shiftable automatic RWD
There is nothing more special than beating out a Mustang GT or Charger! see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
LS2 variant L76 V8 attached to Corvette derived 6-speed automatic and rear end. Really, what else is there to say? Gobs of power launches this two ton rocket 0 to 60 in 5.1 to 5.4 seconds. Baby it on the highway and you can eek out 24 MPG. see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed manual RWD
The LS3/TR6060 combo always have more than enough power. Always. see full Pontiac G8 review
2008 Pontiac G8 Powertrain: Cons
YearBody/PowertrainComment
2009 4dr Sedan 256-horsepower 3.6L V6
5-speed shiftable automatic RWD
Only 256 hp which for a full size sedan is not enough to keep up with a 2.0 T 4 cylinder vehicle that has 274 Hp. see full Pontiac G8 review
 

What Our Members Are Saying about the Tires of the 2008 Pontiac G8

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2008 Pontiac G8 MSRP and Invoice Prices

Body Trim Base Price Invoice Destination
4dr Sedan Base 26,910 25,564 685
4dr Sedan GT 29,310 27,844 685

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