Overview
Models:
Pontiac Grand Prix, GT, GTP, GTP with Competition Group option
Body style / driveline:
5-passenger, front-engine, front-drive sedan
Construction:
unitized body frame, 1- and 2-sided galvanized steel
EPA vehicle class:
midsize sedan
Manufacturing location:
Oshawa, Ontario, Canada
Key competitors:
Nissan Maxima, Nissan Altima, Honda Accord
Engines
3800 3.8L Series III V-6 (L26)
3800 SC 3.8L Supercharged Series III V-6 (L32)
Application:
std on Grand Prix and GT
std on GTP
Type:
3.8L V-6
3.8L supercharged V-6
Displacement (cu in / cc):
231 / 3791
231 / 3791
Bore & stroke (in / mm):
3.8 x 3.4 / 96.52 x 86.36
3.80 x 3.40 / 96.52 x 86.36
Block material:
cast iron
cast iron
Cylinder head material:
cast iron
cast iron
Valvetrain:
OHV, 2 valves per cylinder
OHV, 2 valves per cylinder
Ignition system:
electronic
electronic
Fuel delivery:
sequential-port fuel injection
sequential-port fuel injection
Compression ratio:
9.4:1
8.5:1
Horsepower (hp / kw @ rpm):
200 / 145 @ 5200
260 / 186 @ 5400
Torque (lb-ft / Nm @ rpm):
230 / 312 @ 4000
280 / 380 @ 3600
Recommended fuel:
87 octane
92 octane recommended
Maximum engine speed (rpm):
5900
5800
Emissions controls:
catalytic converter/EGR
catalytic converter/EGR
Estimated fuel economy:
MPG (city / hwy / combined)
20 / 30 / 24
18 / 28 / 22
MPIG (city / hwy / combined)
24 / 40 / 29
22 / 37 / 27
22 / 34 / 26 - with TAP
L/100km (city / hwy / combined)
11.8 / 7.1 / 9.7
12.6 / 7.6 / 10.4
13.0 / 8.3 / 10.9 - with TAP
Transmission
Type:
Hydra-Matic 4T65-E 4-speed electronic automatic FWD transverse
Gear ratios
1):
First:
2.92
Second:
1.57
Third:
1.00
Fourth:
0.71
Reverse:
2.39
Final drive ratio:
3800: 3.05:1 (Grand Prix, GT)
3800 SC: 2.93:1 (GTP)
3800 SC: 3.29:1 (GTP with Comp G Package)
Chassis/Suspension
Front:
MacPherson struts with coil springs, lower A-arm, 20-mm solid anti-roll bar
Rear:
independent, tri-link coil over strut, 17.2-mm anti-roll bar on Grand Prix/GT/GTP
Steering type:
low-friction rack and pinion, power-assisted with Magnasteer I on Grand Prix/GT/GTP, Magnasteer II on GTP with Comp G
Steering ratio:
13.2:1
Steering wheel turns, lock-to-lock:
2.4
Turning circle, curb-to-curb (ft / m):
37.4 / 11.3
Brakes
Type:
4-wheel disc, ABS std on GT and GTP, opt on Grand Prix;
front: vented discs, power assisted;
rear: solid discs, power assisted
Rotor diameter:
front: 11.7 / 297; rear: 10.5 / 270
Wheels/Tires
Grand Prix, GT
GTP
GTP Comp G
Wheel size and type:
16-inch steel, 16-inch 5-spoke aluminum (GT2)
17-inch 5-spoke aluminum, std tire inflation monitoring system
17-inch multi-spoke aluminum, std tire inflation monitoring system
Tires:
Goodyear Eagle LSP225/60R16, S speed-rated
Michelin Energy P225/55R17, H speed-rated
Goodrich Comp T/A P225/55R17, V speed-rated
Dimensions
Exterior
Grand Prix
GT
GTP
Wheelbase (in / mm):
110.5 / 2807
110.5 / 2807
110.5 / 2807
Overall length (in / mm):
198.3 / 5038
198.3 / 5038
198.3 / 5038
Overall width (in / mm):
73.8 / 1875
73.8 / 1875
73.8 / 1875
Overall height (in / mm):
55.9 / 1420
55.9 / 1420
55.9 / 1420
Track (in / mm):
front: 61.7 / 1568
front: 61.7 / 1568
front: 61.7 / 1568
rear: 62.1 / 1577
rear: 62.1 / 1577
rear: 62.1 / 1577
Curb weight (lb / kg):
3477 / 1577
3484 / 1581
3583 / 1625
Weight distribution (% front / rear):
62 / 38
62 / 38
N/A
Interior
Seating capacity (front / rear):
2 / 3
Head room (in / mm):
front: 38.5 / 978; rear: 36.5 / 928
Leg room (in / mm):
front: 42.4 / 1076; rear: 36.5 / 926
Shoulder room (in / mm):
front: 57.9 / 1472; rear: 55.5 / 1410
Hip room (in / mm):
front: 54.6 / 1388; rear: 53.5 / 1360
Capacities
EPA interior volume (cu ft / L):
114 / 3228
Cargo volume (cu ft / L):
16 / 453; 57 / 1614 with all seats folded down
Trailer towing maximum (lb / kg):
1000 / 454
Fuel tank (gal / L):
17 / 64.3
Engine oil (qt / L):
3.8L engine: 4.3 / 4.1
Cooling system (qt / L):
3.8L engine: 11.2 / 10.6
There's a LOT of differences here james.