The 6 Fastest Buicks Ever Made: From the GNX to the 162 MPH Regal GS

Buick doesn’t usually pop up in conversations about speed. Most people think soft seats, retired neighbors, and quiet Sunday drives. But tucked between all that comfort, Buick actually built a handful of cars that could move. Some were legit muscle; others were sneaky-fast sleepers.

Here are six of the quickest Buicks ever made — and how fast they really go when nobody’s watching the speedometer.

1987 Buick GNX — 124 mph

The GNX was Buick’s “surprise, we can do performance too” moment. Built with help from ASC and McLaren Engines, the turbo V6 hit harder than anyone expected. Buick even had to electronically cap it at 124 mph so the chassis wouldn’t freak out. It’s still one of the most loved Buicks ever — and still looks mean today.

2010 Buick LaCrosse CXS — 133 mph

Yes, a LaCrosse. The CXS version used a shared GM V6 that revved nicely and gave this comfy sedan the ability to quietly creep up to 133 mph. It wasn’t meant to be a sports car, but it definitely wasn’t slow.

1986 Buick Regal T-Type — 136 mph

The Regal T-Type was Buick’s other turbo troublemaker. When it came out, magazines couldn’t stop talking about how shockingly quick it was — and they weren’t wrong. With an intercooled turbo V6 making 235 hp, it could climb to 136 mph and embarrass plenty of “real” performance cars of the era.

1970 Buick GSX Stage 1 — 145 mph

One word: torque. The GSX Stage 1 packed a massive 455-cid V8 with 510 lb-ft — more twist than some modern trucks. Only 400 were made, and they could blast up to 145 mph. People didn’t call it the “Hemi Killer” for nothing.

2012 Buick Regal GS — 162 mph

The fastest production Buick ever. A turbo 2.0-liter four-cylinder doesn’t sound exciting, but this little engine delivered. With 270 hp, sharp suspension, and lots of grip, the Regal GS hit a verified 162 mph during Nevada’s Open Road Challenge. It’s the underdog that shocked everybody.

Buick March Indy Car — 236 mph

And then there’s the full-on race car. Buick’s V6-powered Indy machines were absolute rockets. In 1996, Eddie Cheever Jr. set an Indy 500 lap record of 236.1 mph using a wild, Buick-based pushrod engine. Buick hasn’t raced in decades, but that number still raises eyebrows.