40-Years-Family-Owned 1940 Buick Roadmaster Model 71C Sport Phaeton
Ended Dec 05, 2025 at 8:50 PM UTC
Description
“The Roadmaster is Buick’s finest expression of power and luxury.” That statement rang true in 1940 with the introduction of the Buick Roadmaster Model 71C Sport Phaeton—a rare and elegant example of pre-war American automotive design. Part of Buick’s Series 70 line, the Roadmaster nameplate embodied prestige, performance, and innovation. The Sport Phaeton body style, with four doors and seating for six, offered open-air motoring with upscale refinement.
Buick’s 1940 lineup debuted its new “torpedo” styling, featuring integrated headlights, streamlined fenders, and a wider, lower profile. Under the hood, the Roadmaster carried Buick’s powerful 320-cubic inch straight-eight engine, delivering 141 horsepower, paired with a smooth three-speed manual transmission. Advanced coil spring suspension and hydraulic brakes ensured a comfortable and safe ride.
Only 238 Sport Phaetons were produced in 1940, making them exceptionally rare. This particular example shows just under 8,000 miles on the odometer, which is believed ot have rolled over once (just under 108,000 total miles).
Located in Green Bay, this special Buick is now offered with a clean Wisconsin title in the name of the seller's family trust.
Highlights
Owned by the same family for over 40 years
Just 238 Sport Phaetons produced in 1940
Factory Equipment
320.2ci “Buick Fireball Eight” inline eight-cylinder rated at 141 hp
Three-speed manual, column-shift transmission
Independent coil spring front suspension
Hydraulic, internal expanding drums (12-inch front and rear)
Rare Fisher Body Sport Phaeton convertible body
Servicing
Convertible top is believed to have been replaced
Known Imperfections
Lighter is missing
Factory paint and chrome has blemishes and wear commensurate with age
Seller notes some undercarriage rust (see photo gallery)
Ownership History
The seller states, “The car has been in the family for more than 40 years.” He further says the Buick has “only slight surface rust on the underside, and the sides are straight and clean and might be considered great a 10-foot away car. I believe the interior is quite nice.”
Included Items
Both original convertible top center posts
All auction listings on Hagerty Marketplace are created using information provided by the seller. The Marketplace team and the seller have reviewed all information for accuracy to the best of their abilities. Bidders are ultimately responsible for conducting their own due diligence before placing a bid, including verifying details, condition, registration requirements, and compliance with applicable laws. For any questions or additional information, contact the seller.
40-Years-Family-Owned 1940 Buick Roadmaster Model 71C Sport Phaeton
