2005 Pontiac Grand Prix - Specs

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Powertrain / Chassis	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	3.8 x 3.4 / 96.52 x 86.36
Block material	thin wall cast iron	thin wall 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 @ 5200
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
MPG (city/hwy/comb)	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	2005 Pontiac Grand Prix
Type	Hydra-Matic 4T65-E 4-speed electronic automatic FWD transverse
Gear Ratios (:1)
1st	2.92
2nd	1.57
3rd	1.00
4th	0.71
Reverse	2.39
Final drive ratio	3800: 3.05:1 (GT)
	3800 SC: 2.93:1 (GTP)
	3800 SC: 3.29:1 (GTP with Comp G Package)

Chassis / Suspension	2005 Pontiac Grand Prix
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 GT/GTP
Steering type	low-friction rack and pinion, power-assisted with Magnasteer I on GT2/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		2005 Pontiac Grand Prix
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 (in / mm)	front	11.7 / 297
	rear	10.5 / 270

Wheels and Tires	Grand Prix, GT	GTP	GTP Comp G
Wheel size & 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

Exterior Dimensions		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	61.7 / 1568	61.7 / 1568
	rear	62.1 / 1577	62.1 / 1577	62.1 / 1577
Curb weight (lb / kg)		3477 / 1577	3484 / 1581	3583 / 1625
Weight distribution (% front / rear)		62 / 38	62 / 38	not available

Interior Dimensions		2005 Pontiac Grand Prix
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	2005 Pontiac Grand Prix
EPA passenger volume index (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