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The referenced ranking puts the 2009 Pontiac G8 GXP first at 185 mph, followed by the 2006 GTO at 170 mph and the 2002 Firebird Trans Am WS6 at 162 mph. Those are the figures reported by SlashGear, not the outcome of one consistent set of instrumented tests: the entries mix differing evidence types, and the G8’s 185-mph figure is described as governor-limited without a comparable test account.
The list is useful as a snapshot of reported Pontiac top speeds, but its order should not be read as a definitive, apples-to-apples test ranking. Here are all 11 entries, with the evidence caveats and better-documented historical test results kept distinct.
How the ranking should be read
Top-speed figures can come from a manufacturer claim, an independent instrumented test, a speedometer reading, an electronically limited speed, or a racing record. Those are not equivalent measurements. The SlashGear ranking, updated August 30, 2026, does not establish one method across all 11 cars, so its figures are best treated as reported numbers rather than a uniformly verified comparison.
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Top speed is also different from acceleration. The ranking includes 0–60-mph and quarter-mile figures in addition to terminal-speed claims; neither acceleration measure establishes a car’s top speed.
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The 11 Pontiac cars in the reported ranking
The figures below reproduce SlashGear’s stated list in ascending order. The 1973 Trans Am entry has an internal discrepancy: its heading says 104 mph, while the article’s text describes a test result of 103.56 mph. That is one result presented at two levels of rounding, not evidence of separate runs.
| Rank | Pontiac and model year | Reported top speed | What the figure establishes |
|---|---|---|---|
| 11 | Firebird Trans Am 455 Super Duty (1973) | 104 mph (heading); 103.56 mph (text) | SlashGear’s text describes a test with a full tank and stock automatic transmission; the heading rounds the figure. |
| 10 | Pontiac 2+2 (1965) | 115–125 mph | SlashGear’s stated range; a comparable independent test citation is not established here. |
| 9 | Pontiac Tempest Super Duty (1963) | 123 mph | SlashGear’s stated figure; a comparable independent test citation is not established here. |
| 8 | GTO Judge (1969) | 130 mph | SlashGear’s stated figure; a comparable independent test citation is not established here. |
| 7 | Bonneville GXP (2004) | 138 mph | SlashGear’s stated figure; a comparable independent test citation is not established here. |
| 6 | Grand Prix GXP (2005) | 143 mph | SlashGear’s stated figure; a comparable independent test citation is not established here. |
| 5 | Solstice GXP (2007) | 155 mph | SlashGear’s stated figure; a comparable independent test citation is not established here. |
| 4 | Firebird Trans Am (1998) | 160 mph | SlashGear’s stated figure; a comparable independent test citation is not established here. |
| 3 | Firebird Trans Am WS6 (2002) | 162 mph | SlashGear’s stated figure; it is not interchangeable with results for other Firebird configurations. |
| 2 | GTO (2006) | 170 mph | SlashGear’s stated figure; the article does not provide a corresponding independent top-speed test citation. |
| 1 | G8 GXP (2009) | 185 mph | SlashGear describes this as governor-limited; an independent test account confirming the exact figure is not established here. |
What historical Firebird tests add
Separate test accounts offer useful reference points, but they concern different years and configurations; they do not verify every Firebird entry in the ranking.
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- 1979 Trans Am: Jalopnik recounts a Car and Driver test at 132 mph. The tested car had a 400-cubic-inch V8, four-speed manual transmission, and 3.23 final drive.
- 1989 Turbo Trans Am: Jalopnik says Motor Trend captured a 162-mph radar peak. A separate Car and Driver test reported 153 mph.
- Fourth-generation, 30th Anniversary Firebird: Jalopnik recounts a Car and Driver result of 163 mph and says the car was electronically limited at that speed.
These accounts show why configuration and evidence matter. For example, the 162-mph radar peak belongs to a 1989 Turbo Trans Am, not the 2002 WS6. The 163-mph result is for a 30th Anniversary fourth-generation Firebird, not the same specification as the 1998 entry.
Why the Bonneville Trans Am record is a different category
A modified 1987 Trans Am GTA built for Bonneville racing is sometimes a tempting addition to Pontiac top-speed lists, but it is not a production road-car comparison. Banks Power describes extensive race preparation, including twin turbochargers and a 454-cubic-inch engine.
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Banks reports a 267.618-mph two-way average for the car’s 1986 Bonneville result. Its accounts of the 1987 run distinguish a 268.033-mph record, a 277-mph timed top speed, and a 283-mph terminal speed under rainy conditions. Those figures describe different measurements and conditions; none is a stock Pontiac production-car speed. Banks explains that a Bonneville record is based on averaging one run down the course with a return run, rather than using the fastest one-way terminal speed.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which Pontiac is fastest?
Within SlashGear’s 11-car list, the answer is the 2009 G8 GXP at a reported 185 mph, with the 2006 GTO next at 170 mph. The available accounts do not establish those figures through a common, independently documented test method. The ranking is therefore a useful guide to reported claims, not proof that the G8 was verified at 185 mph or that every listed car was tested under matching conditions.
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Sources
- SlashGear’s Pontiac top-speed ranking, updated August 30, 2026, for the 11 entries and their stated figures.
- Jalopnik’s Firebird top-speed discussion for its accounts of historical tests and configurations.
- Banks Power’s “Warrior In Repose” and “Banks Twin-Turbo Trans Am GTA” for the Bonneville car and record context.
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