Acceleration

Base	GXP	Class Average
6	8	5.6

The base model's V6 provides ample power for everyday use. Though many rivals offer automatic transmissions with 5 or 6 speeds, Grand Prix's 4-speed is smooth and prompt. GXPs are muscular. Pontiac's claim of 5.6 seconds 0-60 mph feels about right. Channeling 303 hp through the GXP's front wheels causes some torque steer, despite Pontiac's efforts to quell it by giving this model sport suspension and tires that are wider in front than in the rear.

Fuel Economy

Base	GXP	Class Average
5	4	5.6

In Consumer Guide testing, base models averaged 17.1-19.0 mpg. A GXP averaged 17.0. Base versions use regular-grade gas. Pontiac recommends premium for the GXP.

Ride Quality

Base	GXP	Class Average
7	6	6

Base Grand Prixes are comfortable on uneven pavement but can be floaty at highway speeds. GXP is more stable and firm over bumps but is never harsh.

Steering/Handling/Braking

Base	GXP	Class Average
6	7	6

All models are composed and balanced for their size. The steering feels firm and responsive, but Grand Prix's wide turning circle hampers close-quarters maneuvering. Brakes on test cars provided adequate control, despite a numb and mushy pedal.

Quietness

Base	GXP	Class Average
7	6	6

Wind noise is kept in check. GXP's low-profile tires slap on sharp pavement joints, but road rumble is otherwise unobtrusive. The V6 sounds gruff in full-throttle acceleration. The V8 is much smoother and more refined.

Controls

Base	GXP	Class Average
6	6	6.3

Grand Prix has large gauges and easy-to-use controls.

Details

Base	GXP	Class Average
3	3	5.6

Interior materials disappoint for the price, with an array of hard, cheap-looking plastic.

Room/Comfort/Driver Seating (front)

Base	GXP	Class Average
7	7	6.7

There's ample legroom up front, but no excess of headroom, particularly with the available sunroof. The seats provide good side support in turns. Some of our testers say long-trip comfort is compromised by seatbacks that are too firm. Thick windshield pillar bases hamper outward vision.

Room/Comfort (rear)

Base	GXP	Class Average
3	3	5.2

Rear seat comfort is disappointing for a vehicle this size. There's fair legroom, but limited foot space. The seatback is uncomfortably hard, and a low cushion provides little thigh support. Wide-opening rear doors ease entry and exit, but a low roofline means adults must duck for their heads to clear.

Cargo Room

Base	GXP	Class Average
4	4	4.1

Trunk volume is average for the class, but Grand Prix's available fold-flat right-front seatback and standard 60/40 split folding rear seat can expand load volume for objects up to 9.5-ft long. Wide-opening rear doors ease loading bulky items. Interior storage is unexceptional.

Value within Class

Base	GXP	Class Average
6	6	6.2

It trails our top-rated Honda Accord and Toyota Camry for interior quality, and rear-seat comfort is subpar. Still, Grand Prix appeals for its good performance, comfortable ride, cargo versatility, and plenty of features at competitive prices. The potent GXP is worth a look for shoppers who put a premium on power and expressive styling.

Total Score

Base	GXP	Class Average
60	60	63.3

Scores for all Midsize Cars

Low Score		48
Average Score		63
High Score		74