1957 Buick Roadmaster Model 75

4dr Riviera Hardtop

8-cyl. 364cid/300hp 4bbl

#1 Concours condition#1 Concours
#2 Excellent condition#2 Excellent
#3 Good condition#3 Good

$20,600*

equal0%
#4 Fair condition#4 Fair
Value Graph04/2407/2410/24$5k$10k$15k$20kJan 2025
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1957-1958 Buick Roadmaster stats
Highest sale
$214,500
Lowest sale
$4,400
Most recent sale
$29,137
Sales
72

Photos

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1957 Buick Roadmaster Convertible
1957 Buick Roadmaster Convertible
1957 Buick Roadmaster Convertible
1957 Buick Roadmaster Convertible
1957 Buick Roadmaster Convertible
1957 Buick Roadmaster Convertible
1957 Buick Roadmaster Convertible
1957 Buick Roadmaster Convertible
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Model overview

Model description

In the legendary 1957 model year, Buick updated its premium Roadmaster Series 70, and introduced a new Series 75 as the top of the line. Along with the Series 50 Super, the Roadmasters were Buick’s largest cars. The changes from the 1956 model year were significant -- the 1957 Roadmasters were dramatically styled with chrome sweep spears and chromed rear splash area rockers.

The 4-door sedan body in the older Roadmasters was gone from the lineup for 1957. In this era, Roadmasters were available as 2-door or 4-door hardtops, or as a 2-door convertible. There is some confusion about the Riviera model designation in this era. Starting in 1949, the Riviera name had been applied to hardtop Buicks of any series. So in 1957, all Roadmasters except the convertibles were Rivieras.

Another variation to note in the 1957 Roadmasters is that early model year examples were offered with three-piece rear windows, but a mid-year revision allowed a one-piece rear window option that became standard in 1958. The two rear window styles were produced in roughly equal numbers in both of the closed body styles.All Series 75 Roadmasters used the one-piece rear window. Series 75 cars offered a more luxurious interior and all power-assisted features were standard. Options included air conditioning, radios, seat belts, and the usual array of small features. Both Series 70 and Series 75 Roadmasters featured four Ventiports on the front fenders.

Engine power was provided by the standard 364-cid Buick Nailhead V-8, with 10:1 compression and a four-barrel carburetor. This engine was rated at 300 hp, but an optional high-performance package boosted that to 330 hp. The 2-speed Dynaflow automatic transmission was standard on all Roadmaster models.

For 1958, Buick dropped the Series 70 Roadmaster, focusing on the Series 75 and bringing in the Limited series as the new top-of-the-line model. The sweep spear was lowered to accommodate a rocket-shaped trim panel on the rear fenders. Another distinguishing item on the 1958 Buicks is the lack of the traditional Ventiport portholes. The engine and drivetrain proceeded unchanged.

Collectors will want to focus on the convertibles, though any Roadmaster in this era is collectible. Total Roadmaster production in 1957 and 1958 is close to 60,000 cars, but only about 5,500 of those were convertibles. The 1957 high performance kit may be found on some cars, but check provenance to be sure. Series 75 cars from 1957 will be better equipped than Series 70. Body differences between the two years will be purely a matter of personal preference.

Vehicle specifications

  • Shipping Weight4355 lbs
  • Vehicle Length215.3 in
  • Wheelbase - Inches127 in
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Common Questions

The value of a 1957 Buick Roadmaster Model 75 can vary greatly depending on its condition, mileage, options, and history. Typically, you can expect to pay around $20,600 for a 1957 Buick Roadmaster Model 75 in good condition with average spec.

The highest selling price of a 1957 Buick Roadmaster Model 75 at auction over the last three years was $36,750. The highest prices are usually reserved for rare or exceptionally well-maintained examples with desirable features or modifications and excellent history.

The lowest selling price of a 1957 Buick Roadmaster Model 75 at auction over the last three years was $17,594. The lowest prices are usually paid for examples that have extensive maintenance needs, differ greatly from their original configuration, or have accident histories or title problems.

In the last three years there have been 3 1957 Buick Roadmaster Model 75s sold at public auction.

The most recent auction sale of a 1957 Buick Roadmaster Model 75 was $17,594 on August 21, 2024 by Bring a Trailer.

Many factors can increase a car's value including excellent condition, exceptional originality, a recent restoration, low mileage, unique provenance, desirable options, popular or unique color choices, and excellent maintenance records. Upgrades and modifications that enhance performance or aesthetics can also add value.

Factors that can decrease a car's value include unusually high mileage, poor maintenance history, visible wear and tear, accidents or damage, title issues, and gaps in ownership history. Additionally, less popular color choices and extensive modifications that don't appeal to a broad audience can reduce value.

Mileage plays a significant role in a classic car’s value. Lower mileage usually increases value because it indicates a higher degree of originality, is rarer, and suggests less wear and tear. However, cars with exceptionally low mileage may also have maintenance needs due to lack of use. Whether someone should pay more for a vehicle with lower miles will depend on how they plan on using it, and the vehicle's specific condition.

The value of modified cars differs widely based on the type and quality of modifications. While some modifications can significantly increase value, especially performance enhancements and high-quality custom work, others may not add much or could even detract from the car’s value if they appeal to only a limited audience.

All prices shown here are based on various data sources, as detailed in About Our Prices. The Hagerty Price Guide is for informational purposes only and is not intended as financial advice. More information on how forecast models are calculated can be found on Forecasted Values page. For additional information and a complete description of benefits, visit hagerty.com/legal. Purchase of insurance not required for membership in HDC. Hagerty, Hagerty Valuation Tools & Hagerty Drivers Club are registered trademarks of The Hagerty Group LLC, ©2025 The Hagerty Group, LLC. All Rights Reserved. The Hagerty Group, LLC is a wholly owned subsidiary of Hagerty, Inc.