The Buick Grand National was a performance version of the Regal that took an unusual route to muscle-car performance: a turbocharged 3.8-liter V6 instead of the familiar big-displacement V8. Its identity developed over a short run, from a modest 1982 debut to the intercooled 1986–87 cars, then the limited-production 1987 GNX.
What was the Buick Grand National?
The Grand National was a performance Regal, not a separate model line unrelated to Buick’s sedan. Its unconventional reputation comes from pairing the Regal with forced induction and a V6, rather than following the large-displacement V8 formula commonly associated with American muscle cars. That is a useful description of the car’s character, not a claim that every muscle car used the same formula.
The name also covers cars that were not mechanically identical. The 1982 Grand National had a naturally aspirated V6 according to OPGI’s history; the turbocharged 3.8-liter engine arrived with the nameplate’s 1984 return. Intercooling followed for 1986, and the 1987 GNX added a more extensively modified package.
How the Grand National changed from 1982 to 1987
| Model year | What changed | Reported output or production |
|---|---|---|
| 1982 | Debut as a Grand National Regal; OPGI describes a naturally aspirated 4.1-liter V6. | GNTType lists 125 hp, 205 lb-ft and 215 cars. It says it believes only 16 were turbocharged, but that count is uncertain. |
| 1983 | The Grand National name took a year off. | Not stated by the cited sources. |
| 1984 | The Grand National returned with a turbocharged 3.8-liter V6. | OPGI reports 200 hp and 300 lb-ft. |
| 1986 | Buick added an intercooler and revised the intake/plenum. | Car and Driver reports 235 hp and 330 lb-ft. |
| 1987 Grand National | The intercooled turbo V6 continued in the final Grand National model year. | Car and Driver reports 245 hp and 355 lb-ft. Production totals differ by source: GNTType lists 20,193; Car and Driver gives 20,740. |
| 1987 GNX | A limited, more extensively modified Grand National evolution developed with ASC and McLaren Engines. | GM reports 547 built. Car and Driver reports 276 hp and 360 lb-ft. |
The 1982 figures are compiled by GNTType.org, which attributes its production and technical information to the Facts and Figures Book. Its page says it believes only 16 of the 215 cars had turbochargers; that wording does not establish an exact factory count. OPGI’s Grand National history describes the 1982 car as naturally aspirated and the 1984 return as turbocharged.
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Why the turbo V6 made the car different
The key change was not simply a new badge. The 1984 return established the turbocharged 3.8-liter V6 as the Grand National’s defining powertrain. Buick then added an intercooler for 1986, alongside a revised intake/plenum. The reported progression—from 200 hp and 300 lb-ft in 1984 to 235 hp and 330 lb-ft in 1986, then 245 hp and 355 lb-ft for the 1987 Grand National—shows how the package developed.
These are published specifications rather than results from a single comparable test, and the cited sources do not state a common measurement procedure. They are best read as reported model figures, not as a direct performance comparison with every V8 muscle car.
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What made the 1987 GNX different?
GNX stands for “Grand National Experimental.” General Motors says Buick built 547 examples in 1987 with ASC and McLaren Engines. GM’s account identifies several distinctions from the regular Grand National: a T-3 turbo, dual mufflers, a 200-4R transmission, black 16-inch mesh wheels and a numbered plaque on the dashboard. Car and Driver reports 276 hp and 360 lb-ft for the GNX.
The GNX was therefore not just another name for any 1987 Grand National. It was a limited-production derivative with its own hardware and numbered identification. In GM’s 2025 retrospective, Mark Reuss recalled joining GM in 1986 as a Buick powertrain integration development engineer: “I joined GM in 1986, and my first job was powertrain integration development engineer for Buick,” he said. GM also attributes the phrase “Fast With Class” to Lloyd Reuss as a description of the Grand Nationals.
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How many 1987 Grand Nationals were built?
The available published totals do not agree. GNTType lists 20,193 1987 Grand Nationals, while Car and Driver gives a total of 20,740. The sources reviewed do not explain whether the difference comes from counting scope or methodology, so neither figure should be silently substituted for the other or combined into a single total.
For the GNX, the manufacturer figure is clearer: GM’s 2025 retrospective says 547 were built. That count refers to GNXs, not all 1987 Grand Nationals.
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What should buyers and restorers keep in mind?
These cars can attract collectors, but the available evidence supports only a general caution rather than a model-specific mechanical inspection checklist or current valuation. Hagerty’s 2025 report says the cars were often heavily enjoyed when new and that inspection diligence is warranted. For a particular car, assess its present condition and documentation rather than relying on the model’s reputation or a production figure.
For restoration, OPGI maintains a dedicated Buick Grand National parts catalog with year navigation for 1982 and 1984–1987. Confirm the car’s model year and each component’s fitment before ordering; the engines and details changed over the run, and catalog availability alone does not establish that a part fits every Grand National.
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