Two engines were offered: a naturally aspirated 3.8-liter V6 (3800 Series II) for most trims, and a 3.8-liter supercharged V6 for the performance-oriented Grand Prix GTP, delivering around 260 horsepower.
Engine options by trim
Below is a concise rundown of the two engine configurations and the trims they commonly accompanied in the 2004 model year.
- 3.8-liter V6, naturally aspirated (3800 Series II) — Found in the base and GT trims; output typically around 200–205 horsepower with roughly 230 lb-ft of torque.
- 3.8-liter V6, supercharged (supercharged 3800, often associated with the L67 designation) — Found in the Grand Prix GTP; output around 260 horsepower and about 260 lb-ft of torque.
Note: Exact figures can vary by production date and market; consult the vehicle's VIN or badge for precise specifications.
Context and implications
The two engines reflect the model's dual focus: everyday comfort and enhanced performance for enthusiasts who chose the GTP trim. The GTP's supercharged option offered stronger acceleration and more distinctive performance characteristics, while the base/GT models prioritized smoothness and efficiency for daily driving.
Summary
In 2004, the Pontiac Grand Prix offered two engine options: a naturally aspirated 3.8-liter V6 for most trims and a 3.8-liter supercharged V6 for the GTP variant, with horsepower figures around 200–205 hp and 260 hp respectively. Buyers could choose based on desired balance of daily usability versus performance.