The 1948 Buick Roadmaster Convertible represents the peak of post-war American luxury. The Series 70 cars delivered a blend of style, size, and advanced engineering. This particular example has been thoughtfully refurbished sometime before 2020. Its striking maroon paint is complemented by a tan soft top. The car features a 320ci inline-eight engine and a three-speed manual transmission. It remains a powerful testament to Buick’s prestige in the late 1940s.
Classic Roadmaster Exterior and Refinish
The convertible body was originally finished in Carlsbad Black paint. It now wears its current shade of maroon from a previous ownership period. The color change suits the car’s large, flowing proportions beautifully. Polished brightwork and chrome accents are highlights across the body. The dramatic gunsight-style hood ornament sits proudly up front.
Styling and Condition Notes
The car has desirable features such as a split windshield and rear fender skirts. It also includes functional dual side mirrors. The tan convertible top is power-operated and features a glass rear window. It should be noted the fitted spotlight does not work. The car also has fog lights that are currently not wired for operation. Some sealant is visible around the rear window glass.
Interior Appointments and Features
The cabin houses a large, power-adjustable front bench seat. This feature was certainly a luxury item for the period. The seating surfaces are trimmed in supple tan leather upholstery. This material extends all the way to the rear bench seat. Maroon-colored seatbelts have been installed for additional safety. Interior comfort is managed by a cabin heater.
Convenience and Instrumentation Details
Further period convenience is provided by power-operated windows. Front door panel armrests offer occupants extra support. The push-button radio and the clock are noted as non-functional. Wear is visible on the driver’s side of the front bench cushion. The three-spoke steering wheel fronts a 120-mph speedometer. Combination gauges sit on either side of the dial. The five-digit odometer shows approximately 47,000 miles. The seller advises the total mileage reading is likely inaccurate.
Chassis, Wheels, and Running Gear
This Buick Roadmaster rides on 15-inch steel wheels. These wheels wear covers for a finished look. In 2025, the wheels were media-blasted and professionally refinished. They were subsequently mounted with BFGoodrich Silvertown-branded whitewall tires. This refresh ensures a safe and aesthetically pleasing ride quality.
The Straight-Eight Engine and Power
Power for this large machine comes from a 320 cubic inch inline-eight engine. This powerful engine was factory equipped with a two-barrel carburetor. It was originally rated at 144 horsepower when new. The engine is paired with a column-shifted three-speed manual transmission. The engine stamping is clearly visible on the block. The column-shift adds to the authentic classic driving feel.
Recent Maintenance and Performance
Recent service work in 2025 addressed several key components. The thermostat, battery, and upper radiator hose were all replaced. Ignition components were also renewed, including the spark plugs and distributor cap. The rotor and points were also part of this refreshment. An auxiliary electric fan has also been fitted to assist cooling. The spark plug cover panel is currently missing from the engine bay. A collection of spare parts accompanies the sale, including a head gasket set and a carburetor rebuild kit.
Summary of the 1948 Buick Roadmaster
This 1948 Buick Roadmaster Convertible offers a compelling blend of classic American luxury and style. The Series 70 model is sought after for its powerful straight-eight engine and high level of factory equipment. Its striking maroon refurbishment presents very well on the large convertible body. Features like power windows and the power bench seat underscore its top-tier status. This example provides an opportunity to own a distinctive piece of American automotive heritage.
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Source: bringatrailer.com
