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It was difficult to find an American manufacturer that didn’t produce some form of performance car during the muscle car golden age, and Buick was no exception. Iconic models such as the GSX Stage 1 wowed onlookers, though when the end came in the early 1970s, Buick stepped away from the performance car sector somewhat.

It experimented every now and again with creations like the mad 1987 Grand National GNX, though it had completely retired from the performance market by the time the 1990s rolled around. To celebrate its contribution to the enthusiast sector, CarBuzz tracked down its ten most powerful production cars.

10 1960 Buick Electra 225: 325 hp

1960 Electra 225 Specs

The Buick Electra was the brand’s full-size luxury car for over three decades, the car designed to transport its passengers in peace and comfort. This doesn’t mean it can’t contain a bit of grunt though, and quite the contrary, as extra power allows the car to effortlessly gather speed without having to be revved to oblivion.

The 1960 version of the 225 model came with a 6.5-liter V8 that brought along 325 hp. Due to its heavyweight frame, don’t expect to hit 60 mph in under ten seconds. In the right hands, they can also be car show showstoppers.

9 2025 Buick Enclave: 328 hp

2025 Enclave Specs

With Buick’s sporting days long behind it, the marque focuses nowadays on providing mid-to-high-range luxury experiences. The 2025 Enclave SUV is a perfect illustration of this, the model getting plush leather seats and an ultra-modern infotainment setup as standard. It also gets a whopping grille at the front, and everyone knows that the bigger the grille, the more important the vehicle is, right?

Don’t underestimate it though, as its turbocharged 2.5-liter four-pot is capable of producing 328 hp. This is enough to get it to 60 mph in 6.5 seconds, a respectable effort for a large luxury SUV.

8 1971 Buick Riviera GS: 330 hp

1971 Riviera GS Specs

The second and third-generation Riviera is one of the most distinctive-looking cars ever made by Buick, especially from the rear with the large power bulge featured on the trunk lid. While not built for pace, the 1971 model year car got a huge 7.5-liter mounted at the front of the vehicle.

With 330 hp and 455 lb-ft on tap, the Riviera certainly wasn’t short of might. It could reach 60 mph in 8.1 seconds, though think twice about trying to carry that kind of pace through tighter corners.

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7 1969 Buick GS 400: 350 hp

1969 GS 400 Specs

The GS 400 is arguably the first true muscle car on this list, with its curvy mid-size body housing a 6.5-liter V8 that sends 345 hp and 440 lb-ft of torque to the rear tires. The GS 400 also came with the option of getting a limited-slip differential to keep those rear wheels under control, while the choice of a three or four-speed manual transmission was available.

For drivers looking for a more relaxed muscle car experience, the GS 400 could be had with a three-speed automatic gearbox too.

6 1965 Buick Riviera GS: 360 hp

1965 Riviera GS Specs

While the 1971 Riviera was pretty stout, the most powerful of the bunch was the 1965 Gran Sport model. Its 7.0-liter V8 came loaded with 360 hp and 465 lb-ft of torque, which was made possible by a pair of rabid four-barrel carburetors and a dual-exhaust system. A limited-slip diff also came as part of the deal, while heavy-duty suspension was also available as an option to ensure it could tackle the bends more effectively.

With a 0-60 mph time of 8.0 seconds, this was a personal luxury car with attitude.

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5 1966 Buick Super Wildcat GS: 360 hp

1966 Super Wildcat GS Specs

The Wildcat sat below the Electra in Buick’s range as the more performance-geared luxury offering. Its smaller size, and therefore lighter weight figure, meant it was more agile on the road, as well as quicker on the straights.

Its 7.0-liter V8 could push it to 60 mph in just 6.5 seconds, a task made possible with the help of 360 raging horsepower and 465 lb-ft of torque. The Super Wildcat GS was a handy sleeper, as it looked largely like a normal model aside from the sportier wheels.

4 1970 Buick GSX Stage 1: 360 hp

1970 GSX Stage 1 Specs

The 1970 GSX is one of the most iconic muscle cars to result from the golden era of the breed, especially in its famous yellow and black paint scheme. Its monstrous 7.5-liter V8 brought 360 hp to the party, as well as a sky-high 510 lb-ft of torque in Stage 1 form. This included a bump in compression ratio to 10.5:1, as well as more aggressive cam lifters.

It also came with upgraded suspension and brakes to help deal with the power, as well as purposeful front and rear spoilers. The GSX was completed with supportive bucket seats on the inside.

3 1970 Buick Electra 225: 370 hp

1970 Electra Specs

As the 1970s kicked off, the age of the ultra-high power big block V8 was coming to an end. Tightening emissions and government regulations meant that power was starting to be capped, though manufacturers pushed on in the meantime. Buick’s mighty 7.5-liter V8 found a home in many of its cars, such as the Electra 225.

While it made the same 510 lb-ft of torque as it did in the GSX, the engine was tuned to create an extra 10 hp. With 370 hp now at the mercy of its driver, the Electra could transport its important occupants to their destination with barely a whimper.

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2 1970 Buick LeSabre 455: 370 hp

1970 LeSabre 455 Specs

Gearheads looking for a more reasonably sized sedan could opt for the LeSabre, which in 1970 was offered with the same 7.5-liter V8 as in the Electra and GSX. Making 370 hp and 510 lb-ft of torque, the LeSabre 455 could reach 60 mph in only 7.0 seconds.

Unlike the sportier GSX, the LeSabre couldn’t be chosen with a four-speed manual gearbox. The three-speed manual, as well as the three-speed auto, could be had instead. As it was designed more for daily use than its muscle car cousin, it also came with air conditioning, front, and rear carpets as well as a full smoking set as standard.

1 1970 Buick Wildcat Custom: 370 hp

1970 Wildcat Custom Specs

While the LeSabre was geared more towards general everyday use, the Wildcat Custom was available as the sportier luxury option. It came as standard with the 370 hp and 510 lb-ft 7.5-liter V8, with the same three-speed manual or automatic transmission options.

Being the more purposeful of the Buick prestige range, it also had the brand’s Accu-Drive suspension system. This consisted primarily of re-tuned front suspension to make it more reactive through corners, the setup normally combined with a faster-ratio steering layout. As it’s capable of a 0-60 mph time of 6.9 seconds, it certainly needed it.

Sources

Buick, Mecum Auctions, Craigslist