1986 BUICK GRAND NATIONAL - SOLD

PRICE GUIDE: $50,000 - $70,000+

A genuinely rare opportunity to own an iconic 1980s American performance car, powered by Buick’s turbocharged and intercooled 3.8-litre V6. Supplied paperwork refers to a reportedly upgraded engine specification incorporating TRW forged pistons, an H210/205 camshaft and ARP rod bolts, while the car retains its particularly clean factory interior and sinister all-black “Darth Vader” presentation.

• 1986 Buick Grand National
• Turbocharged and intercooled 3.8-litre V6
• GM Heavy Duty 200-4R 4 Speed Automatic transmission
• Recently lowered with Kings Springs
• Original Grand National interior
• Factory black exterior presentation
• Factory wheels
• Power steering
• Air conditioning
• Power windows
• Australian Import approval
• Previously registered in South Australia
• Large collection of new spare parts comes with the sale 
• Offered from one of Australia's largest Buick collections

SUMMARY:

Representing one of the most significant American performance cars of the 1980s, this 1986 Buick Grand National combines the model’s sinister factory all-black presentation with its legendary turbocharged and intercooled 3.8-litre V6.

The 1986 model year was a turning point for the Grand National, introducing a factory air-to-air intercooler that transformed Buick’s turbocharged V6 into one of the most formidable American performance engines of its era. Factory rated at 235hp and 330 lb-ft of torque, the intercooled Grand National recorded sub-14-second performance in period testing, with Car and Driver completing the quarter-mile in 13.9 seconds.

At its heart is Buick’s LC2 231ci/3.8-litre 90-degree V6, featuring a cast-iron block and cylinder heads, 3.800-inch bore, 3.400-inch stroke and 8.0:1 compression ratio. Rather than relying on traditional large-capacity V8 power, Buick combined a Garrett turbocharger, sequential electronic fuel injection, distributorless electronic ignition and sophisticated electronic engine management to produce enormous low and mid-range torque from just 3.8 litres.

Central to the 1986 development was the new factory air-to-air intercooler, positioned between the Garrett turbocharger and engine to reduce intake-charge temperatures before combustion. Cooler, denser intake air allowed Buick to safely extract substantially greater performance under boost, increasing output from the previous year’s 200hp to 235hp and establishing the intercooled architecture that made the 1986 and 1987 Grand Nationals legendary.

Documentation supplied with the vehicle refers to an engine specification incorporating TRW forged pistons, ARP rod bolts and studs, an H210/205 camshaft and an upgraded MAF sensor.

These upgrades would provide a strengthened internal foundation while allowing the car to retain the Grand National’s largely factory-style appearance and unmistakable turbocharged character. Without full documentation, no claim is made regarding the engine’s current internal specification or power output. Prospective purchasers are encouraged to review the accompanying documentation and independently assess the vehicle’s mechanical specification.

Power is transferred through GM’s 200-4R four-speed automatic overdrive transmission, particularly well suited to the considerable torque produced by the turbocharged V6. With a 2.74:1 first gear for strong acceleration and a 0.67:1 fourth-gear overdrive for relaxed highway cruising, the transmission complemented the Grand National’s unusual combination of serious straight-line performance and everyday usability.

Braking is provided by 10.5-inch front disc brakes and 9.5-inch rear drums, assisted by Buick’s distinctive Powermaster electro-hydraulic brake-assist system. Rather than relying solely upon conventional engine manifold vacuum, the Powermaster used an electric motor, hydraulic pump and pressurised accumulator to provide braking assistance—a particularly relevant engineering solution for a turbocharged engine operating under positive manifold pressure while on boost.

The Grand National’s chassis was also more purposeful than its Regal origins might suggest. Factory specification included Buick’s Gran Touring performance suspension, fast-ratio power steering, independent front suspension and a coil-sprung live rear axle located by a four-link arrangement.

This example has subsequently been lowered on King Springs, giving it a more purposeful stance while retaining the fundamental factory G-body suspension architecture.

Visually, few American performance cars are as instantly recognisable. Buick’s decision to almost completely black out the Grand National created the menacing appearance that earned it the enduring “Darth Vader” nickname. Black paintwork, blacked-out trim, front air dam, rear spoiler and distinctive Grand National wheels transformed what began life as a conservative Buick Regal into one of the most intimidating American performance cars of the decade.

The body and paintwork remain faithful to the car’s factory appearance, presenting with various touch-ups and age-related imperfections consistent with its age and use. Importantly, it has not been visually transformed into a heavily modified street or drag car, retaining the understated appearance that makes an authentic Grand National so distinctive.

Inside, the car retains its highly recognisable factory Grand National interior, presenting in particularly clean condition. Two-tone seating with distinctive GN identification, model-specific trim and Buick’s unmistakably 1980s instrumentation create a cabin every bit as characteristic as the black exterior.

Factory equipment including power steering, air conditioning and power windows reinforces the unusual combination of luxury and performance that separated the Grand National from more conventional muscle cars.

This example was imported into Australia under Import Approval No. 105726/7 and was previously registered in South Australia. It is offered with a large collection of brand-new spare parts accumulated by the owner, who had planned to return the car to concours-level condition. These parts represent a valuable inclusion for its next custodian.

The car is being offered from one of Australia’s largest Buick collections.

Presented in largely factory-style configuration, this 1986 Grand National offers an appealing balance of authenticity, performance and usability.

A large collection of new spare parts comes with the sale as photographed.

With its intercooled LC2 turbo V6 architecture, four-speed automatic overdrive transmission, Powermaster braking system, Gran Touring chassis, clean original-style interior and sinister all-black presentation, this genuine Grand National represents an outstanding opportunity to acquire one of the cars that helped redefine American performance during the 1980s.

VIN: 1G4GK4771GP437425
ENG: S16116P
ODOMETRE: 34503  (indicated)

SEPTEMBER 2026