Why this vehicle matters
The Grand National proved you don't need a V8 to be fast. In 1987, this turbocharged V6 sedan could embarrass Corvettes at the drag strip — 13.4 seconds in the quarter mile, stock. Car and Driver called the GNX 'the quickest American production car ever.' The all-black styling earned it the 'Darth Vader' nickname, and the menacing looks backed up the performance. This was the last great rear-wheel-drive American performance sedan of its era, and it killed the malaise attitude dead.
Patina notes
Grand Nationals don't really patina — they either get garage-kept or they rust. The all-black paint shows every scratch and swirl, which is why concours examples command premiums. Original cars with the distinctive turbocharged whine and that surge of boost are increasingly rare. The plastic interior bits age poorly, but the drivetrain is essentially a truck engine — it'll outlast everything else.
Ownership reality
The turbo V6 is a torque monster that's relatively easy to modify. The aftermarket is strong, especially for turbo upgrades. The 200-4R transmission is the weak link — they can handle stock power, but upgrades demand a rebuild. These cars rust in predictable places (rocker panels, trunk, floors), so rust-free examples from the South or West command premiums. Daily drivable? Absolutely — it's just a G-body with a boost button.
The verdict
Buy if
You want '80s performance nostalgia that's actually fast. You appreciate the sleeper aesthetic. You're ready to join the turbo Buick cult.
Skip if
You need manual transmission. You can't handle the constant 'what is that?' questions. You want something that sounds like a muscle car (it sounds like a turbocharged V6).
What to look for
- → Rust in rocker panels, trunk, and floors
- → Boost gauge operation (should read 14-15 psi stock)
- → Transmission behavior (slipping means rebuild time)
- → Original turbo vs replacement (stock Garrett is robust)
- → Interior condition (dashboards crack, door panels sag)
- → Engine knock sensor operation (critical for detonation protection)
Common problems
- ⚠ 200-4R transmission failures under modified power
- ⚠ Turbo oil feed line leaks
- ⚠ MAF sensor failures
- ⚠ Fuel pump inadequate for high-boost builds
- ⚠ Rust in structural areas
- ⚠ Climate control blower motor failures
Parts & community
Parts sources
- Kirban Performance
- Full Throttle Speed
- GBodyParts.com
- Precision Turbo (upgrades)
- Champion GN (performance parts)
Forums & communities
- TurboBuick.com
- GBodyForum.com
- V6Buick.com
Sources
- Hagerty Valuation Tools · 2026-02-03
- Hemmings Motor News · 2026-02-03
Specifications
| Engine | 3.8L Turbocharged V6 |
| Power | 245 hp (276 hp in GNX) |
| Torque | 355 lb-ft (360 lb-ft in GNX) |
| Transmission | 4-speed automatic (200-4R) |
| Drivetrain | RWD |
| Weight | 3,400 lbs |
| Wheelbase | 108.1 inches |
| Production | 20,193 (1987 Grand Nationals) |
Notable Features
- • Turbocharged V6 outran V8 competitors
- • GNX was the ultimate version (547 built)
- • Darth Vader styling in all-black
- • Sequential fuel injection
About Buick
GM's 'near-luxury' division that occasionally built absolute weapons. From the Skylark to the Grand National, Buick proved you don't need a muscle car badge to be fast.
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