Originally posted by Adam S.:
Was the one tested a Comp G? This would make a difference; the Comp G has a different axle ratio available, believe it or not. There is a noiceable acceleration difference between the two.
2004 Pontiac Grand Prix GTP Competition Group
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C/D TEST RESULTS
ACCELERATION (Seconds)
Zero to 30 mph: 2.4
40 mph: 3.5
50 mph: 4.8
60 mph: 6.6
70 mph: 8.5
80 mph: 10.7
90 mph: 13.9
100 mph: 17.7
110 mph: 22.3
120 mph: 28.0
Street start, 5–60 mph: 6.8
Top-gear acceleration, 30–50 mph: 3.2
50–70 mph: 4.4
Standing 1/4-mile: 15.0 sec @ 93 mph
Top speed (governor limited): 138 mph