Buick Series 40 classic cars for sale

History of the Buick Series 40

Buick introduced the Series 40 in 1930, establishing a durable presence in the American automotive landscape. The first generation gained traction thanks to a stout 4.2-litre straight-six engine producing 80.5 horsepower, a significant figure in its class at the time. The Series 40 was positioned as Buick’s entry-level but did not compromise on size or build quality. After a hiatus in 1934, the model returned in 1935 with a new straight-eight engine, offering improved performance and flexibility across a range of body types. Continuous production and updates saw the Series 40 (as the Special) carry through major industry transitions, including GM’s shift towards modernisation and the introduction of V6 powertrains in the 1960s, making this model a recurring staple for over six decades.

Model History

The Series 40 replaced earlier Buick models as the company’s affordable option, standing below the Series 50 and Series 60. In 1935, the redesigned straight-eight engine marked a technical leap, and the model line diversified into sedans, coupés, and convertibles. The transition in the early 1960s led the Series 40 to re-emerge as the Buick Special—a technological showcase. It later acted as the platform for the introduction of GM’s modern 90-degree V6, a powerplant that would remain central to the corporation for decades. The run ended in 1996 with trim levels on the Buick Century, signifying the model’s continued influence on Buick’s strategy.

Highlights and Features

The Buick Series 40 drew attention as Buick’s most available model, striking a blend between performance and affordability. Noteworthy phases include the introduction of powerful straight-six and straight-eight engines, a focus on comfort and ride quality, and frequent updates to styling across the model’s lifespan. The post-war sedanet and sedan formats, along with convertible bodies, broadened appeal. In terms of availability today, the Series 40 accounts for 71.4% of Buick listings on Classic Trader, and constitutes 70.8% of listing views for the brand—reflecting a robust presence and enduring interest compared to models like the Series 70, which represent a far smaller share.

Technical Data

Special Editions and Collectible Models

Distinct iterations of the Series 40 include the 1935 re-launch with Buick’s straight-eight engine and the post-war four-door sedan and two-door sedanet, both representing the only available models until 1949. Later, drop-top and limited-wheelbase models provided extra collectability and variety, marking key chapters in the Series 40’s evolution as Buick responded to changing tastes and regulations.

Engine and Performance, Transmission and Handling

Driving a Series 40 means experiencing the transition from the robust, torque-rich inline-six to the lighter, punchier straight-eight, and later to the compact and efficient V6. Earlier models delivered generous torque and a soft, comfort-oriented suspension. Reintroductions in the 1960s brought more agile handling in a smaller format, with performance oriented heavily towards smoothness and ride comfort over outright sportiness. Highlight: The 1935 Series 40 with straight-eight engine stands out for increased horsepower versus its predecessor. The 1960s V6-powered Special marked a milestone in engine development and set a new standard for GM entry-level performance.

Interior, Comfort, Exterior and Design

Design and comfort were core strengths of the Series 40. Early models featured intricate chrome grilles and art deco styling. Interiors prioritised plush seating and generous legroom, especially in four-door sedans. Later, post-war sedans and sedanets adopted streamlined profiles and updated dashboards. Convertible models brought additional exclusivity. Series 40 vehicles also allowed for custom colours and materials, following General Motors fashions of each era.

Summary

The Buick Series 40 offers a unique historical arc, from the solid, six-cylinder workhorses of the 1930s to the modernising V6 Specials of the 1960s and onward. The variety of models, frequent technical updates, and expansive availability make the Series 40 a defining part of Buick’s heritage and a key presence in the classic car community.