After years of crossovers and nothing but crossovers, Buick is ready to put a four-door car back in American showrooms, and it’s going to arrive with a layout fans haven’t seen from the Tri-Shield brand since Bill Clinton’s first term. The new sedan will ride on a rear-wheel-drive architecture, share its bones with a next-gen Cadillac and a revived Chevy Camaro, and aim squarely at the entry-luxury crowd.

• First rear-drive Buick passenger car since the 1996 Roadmaster wagon
• Built on the updated GM Alpha 2-2 platform at Lansing Grand River in Michigan
• Production expected to begin in fall 2027, aimed at Lexus and Acura buyers

A 30-Year Wait Finally Ends

Buick is set to re-enter the U.S. sedan segment with a fresh new model, marking a major shift for the Tri-Shield brand after years of focusing only on crossovers. The headline news for enthusiasts? This upcoming sedan will be rear-wheel drive, the first RWD model Buick has offered in roughly three decades. The last RWD passenger car Buick sold was the Roadmaster, which ended production after the 1996 model year.

The gap since Buick last sold any sedan in the U.S. is shorter but still notable. The last one we got stateside was the Regal, which got the axe in 2020. That car was a rebadged Opel Insignia and never had the rear-drive hardware enthusiasts kept asking for. This time, Buick seems ready to actually deliver on what its concept cars have been teasing for years.

The Alpha 2-2 Platform and Its Three New Siblings

The architecture doing the heavy lifting is an updated version of GM’s rear-drive Alpha system. The GM Alpha 2 platform currently serves as the foundation for the Cadillac CT4 and Cadillac CT5. Designed for longitudinal, front-engine, rear-wheel-drive applications, it emphasizes balanced weight distribution, lower mass, and sharp handling.

An updated version of A2, believed to be called A2-2, will underpin the second-gen Cadillac CT5, a Buick sedan, and the seventh-generation Chevy Camaro. Powertrain possibilities already exist in the family parts bin. The Alpha 2 platform has supported a wide range of options, including the turbocharged 2.0L I4 LSY, turbocharged 2.7L I4 L3B, and twin-turbo 3.0L V6 LGY in non-Blackwing variants of the Cadillac CT4 and CT5, along with meaner choices like the twin-turbo 3.6L V6 LF4 and supercharged 6.2L V8 LT4 in the CT4-V Blackwing and CT5-V Blackwing, respectively. Mild-hybrid assistance is also on the table as GM shifts toward electrified combustion cars.

Where It Gets Built and How Many Are Coming

Production for the new Buick sedan is expected to start in fall 2027. The car will be built at GM’s Lansing Grand River plant in Michigan, the same facility producing the CT4, CT5, and previously the Camaro.

Volume will be modest compared with its Cadillac and Chevy cousins. GM is expected to build 60,000 to 70,000 units of the CT5 and Camaro annually. The Buick sedan might see a limited run of 10,000 to 20,000 units per year. That’s a sensible number given how much the U.S. market has shifted toward SUVs, and it gives Buick room to position the car as something a little more special.

Taking on Lexus and Acura in the Midwest

Buick has quietly kept a strong foothold in the middle of the country, where brand loyalty runs deep and dealerships have served families for generations. Shoppers around the Great Lakes, from the suburbs of Detroit to showrooms near Buick Toledo, have long gravitated to the brand for its blend of comfort and value. A rear-drive sport-luxury sedan priced below Cadillac and aimed at cross-shoppers looking at the Lexus IS or Acura TLX could put Buick back on the radar of buyers who walked away when the Regal disappeared.

The upcoming Buick sedan aims to compete with established models in the compact luxury sedan market like the BMW 3 Series, Mercedes-Benz C-Class, and Infiniti Q50. That’s a tougher neighborhood than Buick has played in for a while, but the Alpha 2-2 bones and a proper rear-drive layout give engineers the right starting point.

What to Watch For Before Launch

There’s still plenty to sort out, including the nameplate itself. Buick’s back catalog is full of candidates, from Riviera and Skylark to the obvious Roadmaster revival. Expect camouflaged prototypes to start appearing on public roads well before the 2027 production date, and keep an eye on Lansing for any retooling announcements tied to the new architecture. If Buick gets the styling, pricing, and performance balance right, this could be the most interesting car the brand has built in a generation.