1978–1987 Buick Regal: Second-Generation Base, T-Type and the GS Question
The 1978–1987 Buick Regal is one of those cars whose reputation changed completely over the course of its life. It arrived as a downsized personal-luxury coupe, aimed at the Chevrolet Monte Carlo, Oldsmobile Cutlass Supreme, Pontiac Grand Prix, Ford Thunderbird and Chrysler Cordoba. It left production as the platform that gave Buick its most feared modern performance car: the turbocharged Regal T-Type and Grand National.
Strictly speaking, the familiar GS performance badge was not the defining U.S. production identity of this generation. For the second-generation Regal, Buick used names such as Regal, Regal Limited, Sport Coupe, T-Type, Grand National, Turbo-T and GNX. The T-Type was the important performance trim in this period, not GS. Cars advertised as a 1978–1987 Regal GS should be checked carefully against factory documentation, build sheets, window stickers or regional-market paperwork.
Historical Context and Development Background
GM Downsizing and the Personal-Luxury Battlefield
The second-generation Regal was introduced for 1978 as part of General Motors’ sweeping intermediate downsizing program. Compared with the earlier 1973–1977 A-body Regal, the new car was shorter, lighter and more efficient, yet it retained the traditional American ingredients that mattered to Buick customers: a separate frame, rear-wheel drive, a quiet cabin, soft-edged ride quality and coupe proportions.
The Regal sat in a lucrative and fiercely defended segment. Oldsmobile’s Cutlass Supreme was a sales colossus. Chevrolet’s Monte Carlo offered the same basic personal-coupe formula at a lower price. Pontiac’s Grand Prix pushed a sportier identity. Ford’s Thunderbird and Mercury Cougar competed for buyers who wanted long-hood style without full-size bulk. Buick’s answer was more formal and more restrained, with a premium interior tone rather than the overtly sporting pitch Pontiac used.
From A-Body to G-Body
The 1978 Regal was launched on GM’s rear-drive intermediate architecture, commonly associated with the A-body designation of the period. When GM reassigned its mid-size front-drive cars to the A-body name for the 1982 model year, the remaining rear-drive intermediates were identified as G-body cars. Enthusiasts generally use G-body to describe the later rear-drive Regal, Monte Carlo, Cutlass Supreme and Grand Prix family.
That matters because the Regal’s character came from this architecture. It used conventional front double-wishbone suspension, a coil-sprung live rear axle, recirculating-ball steering and a body-on-frame structure. It was not a European sports sedan in coupe form. It was an American intermediate coupe with a generous engine bay, strong parts commonality and the structural simplicity that made later turbo versions so tunable.
Design, Aerodynamics and NASCAR Influence
The Regal’s 1981 restyle gave the car the sharper, more aerodynamic nose that became central to its competition image. In NASCAR, the Buick Regal body was highly effective during the early 1980s. Darrell Waltrip won the NASCAR Winston Cup championship in 1981 and 1982 driving Buicks for Junior Johnson, and Bobby Allison won the 1983 title in a Buick. The Grand National name itself came from NASCAR terminology, and Buick leaned hard into that association when it began selling blacked-out performance Regals.
The production Regal was not a homologation special in the European sense, but its racing success gave Buick permission to do something unusual: sell a turbocharged V6 personal-luxury coupe as a legitimate performance car while Detroit’s V8 muscle era was still recovering from emissions controls, fuel-economy pressure and insurance stigma.
Engine and Technical Specification Breakdown
Across the 1978–1987 run, Regal engine availability varied by model year, emissions certification, California specification and equipment package. The headline engine is the Buick 3.8-liter V6, particularly in turbocharged form, but naturally aspirated V6s, V8s and diesel engines also appeared in the broader Regal range depending on year and market.
| Engine / Application | Configuration | Displacement | Horsepower | Induction | Fuel System | Compression | Bore x Stroke | Redline / Operating Character |
|---|---|---|---|---|---|---|---|---|
| Late naturally aspirated Buick 3.8 V6, representative base Regal | 90-degree OHV V6, iron block and heads | 231 cu in / 3.8 L | Approximately 110 hp in late emissions-era carbureted form | Naturally aspirated | Carburetor, calibration dependent on year | Varied by year; commonly around 8.0:1 in period applications | 3.800 in x 3.400 in | Low-rpm torque engine; not a high-revving design |
| Regal Sport Coupe Turbo, early turbo era | Turbocharged OHV Buick V6 | 231 cu in / 3.8 L | Early factory ratings were in the mid-160 hp range, depending on year and tune | Turbocharged, non-intercooled | Carbureted draw-through turbo arrangement | Low-compression turbo calibration | 3.800 in x 3.400 in | Boost builds progressively; early systems feel softer than later SFI cars |
| 1984–1985 Regal T-Type / Grand National turbo V6 | Turbocharged OHV Buick V6 | 231 cu in / 3.8 L | 200 hp and 300 lb-ft factory rating | Turbocharged, non-intercooled | Sequential fuel injection | 8.0:1 | 3.800 in x 3.400 in | Factory tach red band generally around 5,000 rpm |
| 1986–1987 LC2 Turbo Regal V6 | Turbocharged OHV Buick V6, iron block and heads | 231 cu in / 3.8 L | 235 hp in 1986; 245 hp and 355 lb-ft in 1987 Turbo Regal tune | Turbocharged and intercooled | Sequential multi-port fuel injection | 8.0:1 | 3.800 in x 3.400 in | Power peak below 5,000 rpm; torque peak quoted at 2,000 rpm for 1987 |
| Oldsmobile 307 V8, selected later Regals | 90-degree OHV V8 | 307 cu in / 5.0 L | Typically rated around 140 hp in late Regal applications | Naturally aspirated | Four-barrel carburetor | Emissions-era low-compression tune | 3.800 in x 3.385 in | Smooth torque delivery; not a performance V8 by muscle-era standards |
Chassis, Gearboxes and Driving Experience
Road Feel and Steering
The base Regal drives like a well-isolated American coupe of its era. The structure is compliant, the steering is light, and the suspension prioritizes ride quality over transient response. The front end uses unequal-length control arms with coil springs, while the rear is a live axle on coil springs located by trailing arms. The result is predictable but never delicate. A Regal communicates through weight transfer and tire noise more than through the steering rim.
Turbo models, especially with the firmer suspension packages, feel more serious. They still have the recirculating-ball steering and body-on-frame softness, but the powertrain transforms the car. The intercooled LC2 cars deliver heavy mid-range thrust rather than theatrical rpm. The car squats, the boost comes in, the 200-4R automatic grabs the next ratio, and the Regal covers ground with an authority that embarrassed many more exotic-looking cars in period testing.
Gearbox Character
Most performance Regals used automatic transmissions, with the later turbo cars best known for the four-speed Turbo-Hydramatic 200-4R with a lockup converter. In turbo form, the transmission was part of the car’s personality: short enough in the lower gears to help spool the turbo, relaxed enough in overdrive to make highway cruising effortless. Correct throttle-valve cable adjustment is critical on the 200-4R; misadjustment can destroy the transmission quickly.
Throttle Response and Turbo Delivery
The early carbureted turbo cars are historically important but less polished. They have more lag, more calibration sensitivity and less repeatable response. The 1984–1985 sequential-injection cars are a major step forward, but they are still non-intercooled. The 1986–1987 intercooled LC2 cars are the definitive version: sharper boost control, stronger charge cooling and a torque curve that gives the Regal its street reputation.
Performance Specifications
Factory ratings and magazine test results do not always tell the same story with these cars. Turbo Regals were traction-limited, weather-sensitive and heavily dependent on launch technique. The figures below reflect representative period performance rather than a single universal number.
| Model | 0–60 mph | Quarter-Mile | Top Speed | Curb Weight | Layout | Brakes | Suspension | Gearbox |
|---|---|---|---|---|---|---|---|---|
| Base Regal 3.8 V6, late representative example | Approximately 12.5–14.0 sec | Approximately 19-sec range | Approximately 100–105 mph | Roughly 3,200–3,400 lb depending on equipment | Front-engine, rear-wheel drive | Front disc, rear drum | Front control arms; rear coil-sprung live axle | Automatic, depending on year and engine |
| 1984–1985 Regal T-Type / Grand National | Approximately 7.5–8.0 sec in period testing | Mid-15-sec range | Approximately 120 mph | Approximately 3,500 lb | Front-engine, rear-wheel drive | Front disc, rear drum | G-body coils with firmer performance calibration on T-Type/GN | THM 200-4R four-speed automatic |
| 1986–1987 Regal T-Type / Turbo-T / Grand National | Approximately 6.0–6.5 sec | High-14-sec range in stock period tests | Approximately 124 mph | Approximately 3,500–3,600 lb | Front-engine, rear-wheel drive | Front disc, rear drum; PowerMaster assist on later turbo cars | Front control arms; rear four-link live axle; 3.42 axle typical on turbo cars | THM 200-4R four-speed automatic |
| 1987 GNX | 4.7 sec in published period testing | 13.5 sec range in published period testing | Approximately 124 mph | Approximately 3,500–3,600 lb | Front-engine, rear-wheel drive | Front disc, rear drum | ASC/McLaren rear suspension revisions with torque arm and Panhard rod | Strengthened THM 200-4R four-speed automatic |
Variant Breakdown and Production Notes
The Regal hierarchy is best understood as two parallel stories: the mainstream personal-luxury coupe and the turbo performance line. Buick did not publish every minor trim breakout in a way that makes all base and Limited production figures equally easy to verify, but the key performance-model counts are well established among marque historians.
| Variant / Edition | Model Years | Production Numbers | Major Differences | Collector Notes |
|---|---|---|---|---|
| Regal Base | 1978–1987 | Exact base-trim split is not consistently published in factory summaries | Personal-luxury coupe trim, naturally aspirated engines, comfort-biased suspension and conventional brightwork | Valued most when original, low-mileage or fitted with unusual options; also commonly used as G-body build platforms |
| Regal Limited | Late second-generation years | Exact trim split not consistently published | More formal luxury trim, plusher interior appointments and additional bright exterior details | Important because 1987 Turbo Limited cars combined the LC2 drivetrain with a sleeper luxury appearance |
| Regal Sport Coupe Turbo | 1978–1980 | Turbo Sport Coupe totals are not as consistently cited as later T-Type/GN figures | Early carbureted turbo 3.8 V6; historically significant as Buick’s first production turbo Regal direction | Rarer in preserved form than later Grand Nationals, but less powerful and more calibration-sensitive |
| Regal T-Type | 1983–1986 | 1983: 3,732; 1984: 3,401; 1985: 2,067; 1986: 2,384 | Performance image package and turbo V6 identity; available in colors beyond Grand National black | Often less visually obvious than a Grand National and attractive to collectors who prefer understated factory performance |
| Grand National | 1982, 1984–1987 | 1982: 215; 1984: 2,000; 1985: 2,102; 1986: 5,512; 1987: 20,193 | Black exterior theme, specific badging and performance positioning; 1984–1987 cars used turbo V6 power | The iconic collectible version of the second-generation Regal line |
| 1987 Turbo-T and related non-GN turbo Regals | 1987 | WE4 Turbo-T: 1,547; Turbo Limited: 1,035; additional Turbo-T production commonly cited at 4,268 | LC2 intercooled drivetrain without full Grand National presentation; WE4 used a black exterior theme with lighter-weight content than GN | Among the best sleeper configurations; documentation is essential because appearance can be easily cloned |
| GNX | 1987 | 547 | ASC/McLaren development, rated 276 hp and 360 lb-ft, revised turbo hardware, intercooling, exhaust, calibration, instrumentation and rear suspension | The blue-chip factory Turbo Regal and the benchmark collectible of the line |
| Regal GS | No regular U.S. second-generation GS trim | Not applicable for the mainstream U.S. 1978–1987 Regal lineup | The T-Type, Grand National and GNX carried Buick performance identity in this generation | Any claimed GS should be verified by original paperwork rather than exterior badging alone |
Ownership Notes: Maintenance, Parts and Restoration Difficulty
Mechanical Durability
The naturally aspirated 3.8 V6 and Oldsmobile 307 V8 are durable when serviced properly, but age is the main enemy. Vacuum hoses, carburetor calibration, ignition components and cooling-system condition often determine how well a base Regal drives. On turbo cars, the LC2 is stout, but it is intolerant of detonation, poor fuel delivery, weak ignition and incorrect modifications.
Turbo Regal buyers should inspect the fuel system, wastegate control, intercooler hoses, mass-airflow sensor, ignition module, coil pack, crank sensor, vacuum lines and exhaust leaks. Oil pressure, timing-chain condition and cooling-system health deserve careful attention. The 200-4R automatic is capable when healthy, but throttle-valve cable geometry and adjustment are critical.
Known Problem Areas
- Rust: lower doors, rear quarters, trunk floors, frame sections, body mounts and roof areas on T-top cars.
- Body fillers: urethane bumper fillers deteriorate with age and sunlight.
- PowerMaster brakes: later turbo cars used an electric brake-assist system that is a known inspection point, especially the accumulator and pressure switch.
- T-top leaks: common on cars so equipped; check floors and interior trim carefully.
- Electrical age: grounds, sensors and connectors can create drivability issues that mimic major mechanical faults.
- Turbo modifications: undocumented boost increases, larger injectors without matching calibration and poor fuel-pump upgrades can reduce reliability.
Parts Availability and Restoration
G-body mechanical parts are generally well supported. Turbo Regal-specific components are also supported by a strong specialist network, especially for 1986–1987 LC2 cars. Interior trim, correct wheels, original badging, 1984–1985 hot-air turbo parts and certain one-year details can be harder to source. Restoration difficulty rises sharply with missing documentation, rust repair and incorrect drivetrain swaps.
For a collector-grade T-Type, Grand National or GNX, originality matters. Window stickers, SPID labels, build sheets, service records and ownership history carry real weight. Clones exist because the basic Regal shell is common and visual conversion parts have long been available.
Cultural Relevance, Racing Legacy and Collector Desirability
The second-generation Regal occupies a rare place in American performance history. It bridged the malaise-era personal luxury coupe and the electronically managed turbo performance car. The 1986–1987 intercooled cars proved that Detroit performance did not need a large-displacement V8 to be formidable. They also gave Buick, a division associated with quiet authority rather than street menace, a genuine outlaw image.
In NASCAR, the Regal’s early-1980s success gave the production cars credibility that no advertising campaign could have created on its own. On the street, the Grand National became a cultural shorthand for blacked-out, boost-fed speed. The GNX then sealed the legend by delivering acceleration numbers that period magazines compared favorably with far more expensive machinery.
Public auction history has long shown a clear hierarchy. Ordinary base Regals trade on condition and originality. T-Types and Turbo-T cars command attention when documented and unmodified. Grand Nationals occupy the broad enthusiast-collector center of the market. GNX examples, especially low-mileage and fully documented cars, have brought six-figure results at major U.S. auctions, with exceptional cars sitting at the top of the Buick performance market.
FAQs: 1978–1987 Buick Regal
Is the 1978–1987 Buick Regal reliable?
A stock, well-maintained base Regal is mechanically simple and generally durable. Turbo Regals can also be reliable, but only when the fuel, ignition, cooling and boost-control systems are healthy. Poor modifications and detonation are the major enemies of the LC2 turbo V6.
What engine is in the Buick Regal T-Type?
The key Regal T-Type engine is the turbocharged Buick 3.8-liter V6. Early versions were non-intercooled, while the definitive 1986–1987 LC2 engine used sequential fuel injection and an intercooler. The 1987 LC2 was factory rated at 245 hp and 355 lb-ft in Turbo Regal applications.
Did Buick build a second-generation Regal GS?
In the mainstream U.S. 1978–1987 Regal lineup, GS was not the regular performance trim. Buick used T-Type, Grand National, Turbo-T and GNX identities for the performance cars. A claimed GS from this generation should be verified with original factory or market-specific documentation.
What is the difference between a T-Type and a Grand National?
The T-Type was the broader performance trim and could be ordered in colors other than black. The Grand National used a more specific appearance identity, most famously the black exterior treatment. Mechanically, equivalent-year turbo T-Type and Grand National models shared the same basic turbo V6 hardware, though equipment and trim content differed.
What are the known problems with a Buick Grand National or T-Type?
Common inspection points include PowerMaster brake issues, weak fuel pumps, aging vacuum hoses, MAF sensor problems, ignition-module faults, cracked headers, oil leaks, rust, deteriorated bumper fillers and abused 200-4R transmissions. Documentation and evidence of correct tuning are especially important.
Which second-generation Regal is most collectible?
The 1987 GNX is the top collectible by rarity, factory specification and performance. Below that, documented low-mileage Grand Nationals, 1987 Turbo-T variants, Turbo Limited cars and clean T-Types are the most desirable. Base Regals appeal more to preservationists and G-body enthusiasts unless exceptionally original.
How fast is a stock 1987 Buick Grand National?
Period testing generally placed a stock 1986–1987 intercooled Grand National or Turbo Regal at roughly 6.0–6.5 seconds from 0–60 mph, with quarter-mile times in the high-14-second range. Launch conditions, tires, fuel quality and state of tune make a significant difference.
Is the 200-4R transmission a weakness?
It is not inherently a bad transmission, but it must be correctly adjusted and maintained. The throttle-valve cable setting is critical. A misadjusted cable can quickly cause internal damage. Turbo cars with added power benefit from careful transmission setup by a specialist familiar with the 200-4R.
Are parts available for the second-generation Regal?
Mechanical and chassis parts are generally accessible because of the broad GM G-body parts base. Turbo Regal-specific support is strong for 1986–1987 cars. Correct trim, interior pieces, original wheels, hot-air turbo components and rare documentation items are harder to replace.
