2008 Pontiac G8 Road Test Specs | Edmunds.com

2008 Pontiac G8 - Road Test Specs

2008 Pontiac G8 Sedan

(3.6L V6 5-speed Automatic)


Model year2008
Style4dr Sedan (3.6L 6cyl 5A)
Base MSRP$26,910
Options on test vehicleComfort and Sound Package
As-tested MSRP$28,390


Drive typeRear-wheel drive
Engine typeV6
Displacement (cc/cu-in)3,564cc (217cu-in)
Block/head materialAluminum/ Aluminum
ValvetrainDouble overhead camshaft, 4 valve/Cyl
Compression ratio (x:1)10.2
Redline (rpm)6,900
Horsepower (hp @ rpm)256 @ 6,300
Torque (lb-ft @ rpm)248 @ 2,100
Transmission type5-speed Automatic
Transmission and axle ratios (x:1)I = 3.42, II = 2.21, III = 1.60, IV = 1.00, V =0 .75, R = 3.02, FD = 2.92


Suspension, frontIndependent, MacPherson Struts, Coil Springs and Stabilizer Bar
Suspension, rearIndependent, Multilink, Coil Springs and Stabilizer Bar
Steering typeSpeed-proportional, rack and pinion power steering
Steering ratio (x:1)Variable
Tire brandGoodyear
Tire modelEagle RS-A
Tire typeAll season
Tire size, frontP245/45R18 96V
Tire size, rearP245/45R18 96V
Wheel size18 x 8
Wheel materialPainted alloy
Brakes, front11.73-in. ventilated disc, two piston caliper
Brakes, rear11.89-in. ventilated disc, two piston caliper

Track Test Results

0-45 mph (sec.)4.9
0-60 mph (sec.)7.6
0-75 mph (sec.)11.0
1/4-mile (sec. @ mph)15.6 @ 89.6
0-60 with 1 foot of rollout (sec.)7.3
Braking, 30-0 mph (ft.)31
60-0 mph (ft.)123
Slalom, 6 x 100 ft. (mph)63.9
Skid pad, 200-ft. diameter (lateral g)0.84
Sound level @ idle (dB)43.2
@ Full throttle (dB)80.2
@ 70 mph cruise (dB)68.0

Test Driver Ratings & Comments

Acceleration commentsUninspired acceration, the V6 is noisy and the sound isn't good. Thankfully the transmission is crisp and consistent.
Braking ratingAverage
Braking commentsMushy pedal even on the first stop -- doesn't inspire confidence, lots of dive under hard braking.
Handling ratingAverage
Handling commentsVery good balance but plenty of understeer. Lacks composure in fast transitions, lacks roll stiffness.

Testing Conditions

Elevation (ft.)1,121
Temperature (F)N/A
Wind (mph, direction)N/A

Fuel Consumption

EPA fuel economy (mpg)17 city/ 25 highway
Edmunds observed (mpg)16.1 combined average (16.9 best; 15.5 worst)
Fuel tank capacity (U.S. gal.)19

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)3,885
Curb weight, as tested (lbs.)3,945
Weight distribution, as tested, f/r (%)51/49
Length (in.)196.1
Width (in.)74.8
Height (in.)57.7
Wheelbase (in.)114.8
Track, front (in.)62.7
Track, rear (in.)63.3
Turning circle (ft.)37.4
Legroom, front (in.)42.2
Legroom, rear (in.)39.4
Headroom, front (in.)38.7
Headroom, rear (in.)38.0
Shoulder room, front (in.)59.1
Shoulder room, rear (in.)59.1
Seating capacity5
Cargo volume (cu-ft)17.5
Max. cargo volume, seats folded (cu-ft)17.5


Bumper-to-bumper3 years / 36,000 miles
Powertrain5 years / 100,000 miles
Corrosion6 years / 100,000 miles
Roadside assistance5 years / 100,000 miles
Free scheduled maintenanceNot Available


Front airbagsStandard
Side airbagsStandard dual front
Head airbagsStandard front and rear
Knee airbagsNot Available
Antilock brakes4-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution
Traction controlStandard
Stability controlStandard
Tire-pressure monitoring systemTire pressure monitoring
Emergency assistance systemNot Available
NHTSA crash test, driverNot tested
NHTSA crash test, passengerNot tested
NHTSA crash test, side frontNot tested
NHTSA crash test, side rearNot tested
NHTSA rollover resistanceNot tested

New Car Buying Guides

See which cars and trucks our editors recommend

  • Sedan
  • Minivan
  • SUV
  • Convertible
  • Truck
  • Hybrid/Electric