2005 Pontiac Grand Prix

GTP Sedan

3.8L OHV Supercharged V6

Automatic

2G2WR524541321446

Clear

Gasoline

Car drives and runs GREAT. Very fun car! Engine and Drivetrain Pontiac gave the 2005 Grand Prix GTP a supercharged version of the base model's 3.8-liter, OHV, V-6 engine, with two valves per cylinder. Bore and stroke were 3.82 inches by 3.39 inches. The GTP generated 260 horsepower at 5,400 rpm and 280 foot-pounds of torque at 3,600 rpm, compared to the base model's 200 horsepower at 5,200 rpm and 230 foot-pounds at 4,000 rpm. The compression ratio on the supercharged GTP was 8.5-to-1, compared to the 9.4-to-1 of the base model. The 2005 GTP was in the power ballpark of the original 1962 Grand Prix, equipped with the base 389-cubic-inch V-8 engine that generated 303 horsepower. Pontiac paired the V-6 in the front-wheel-drive GTP with a four-speed automatic transmission. A TAPshift, for Touch Activated Power, four-speed transmission was available as part of the Competition Group, or Comp G, option package. The TAPshift tranny included steering wheel-mounted paddles that allowed the driver to shift manually. Performance The 2005 Grand Prix GTP was quick, running 0 to 60 mph in 6.6 seconds and posting a 15-second quarter mile. Those times were actually better than the original 1962 Grand Prix's figures, which registered 0 to 60 mph in 7.8 seconds and a 16.9-second quarter mile. Top speed on the GTP was an electronically limited 138 mph. It took 130 feet to bring the GTP from 60 mph to a full stop. But the power and speed of the supercharged GTP came at the cost of fuel efficiency, including the requirement for premium gasoline, when compared to the base model. When equipped with the TAPshift transmission, the GTP got 16 mpg in the city and 24 mpg highway for a combined 19 mpg. Models without TAPshift did slightly better, 17 mpg city, 26 mpg highway and a combined 20 mpg. Base models got 18 mpg in the city and 27 mpg highway for a combined 21 mpg, and did it running regular gas. With the standard 17-gallon fuel tank, a TAPshift equipped GTP had a range of 291 miles, compared to 306 miles for non-TAPshift models and 321 miles for a base Grand Prix.On Mar-08-16 at 10:06:28 PST, seller added the following information: