1975 Oldsmobile Delta 88 Royale

Description

The early- to mid-1970s saw the last of the truly full-size Oldsmobile Delta 88s, a model that Olds built for five decades (1949-1999). The seventh-generation Delta 88 rode on a 124-inch wheelbase under the GM B-Body; offered a long, sculpted design and spacious interior; and featured standard equipment that included vinyl or cloth upholstery, power front disc brakes, and “flo-thru” ventilation. 

Moving up from the base Delta 88 were the Custom and Royale series. The Custom version mainly added power steering, while the Royale option could be had with leather upholstery, a vinyl-covered roof, deluxe steering wheel, and special paint package. The Royale was available as a two-door hardtop or two-door convertible, which came with a power top. 

Collectors shopping this era of Oldsmobile Delta 88 will want to seek out the Royale line, with its enhanced comfort. Convertibles are especially attractive, mostly due to rarity. Of the 118,082 Delta 88 models built for 1975, only 7,181 were Royale convertibles. And this one is powered by the desirable 455 cubic-inch V8 with four-barrel carburetor. 

Highlights 

• Finished in black paint over red interior with vinyl upholstery 

• 455 cu-in Rocket V8 with four-barrel carburetor rated at 210 hp and 375 lb-ft 

• Turbo-Hydramatic 400 (TH400) three-speed automatic transmission 

• The chassis number (3N67T5M304803) decodes as: 

  • 3 – Oldsmobile 

  • N – Delta 88 Royale 

  • 67 – Two-door convertible 

  • T – 455 cu-in V8 four-barrel carb  

  • 5 – 1975 model year 

  • M – Lansing, Michigan, assembly plant 

  • 304803 – Sequential production number 

Features 

• Black convertible top with glass rear window 

• Power steering, brakes, and windows 

• Air conditioning 

• Cruise control 

• 100 mph speedometer 

• AM/FM radio with power antenna 

• Factory wire wheel covers 

• New Vercelli Classic 787 All-Season 235/75R15 whitewall tires 

Known Imperfections 

• Paint scuff (touched up) and bubble on front of hood 

• Multiple paint chips and some light corrosion on lower portion of the fenders 

• Mostly light corrosion on underside with a rust-through patch on the passenger rear 

• Paint scuff and bubble on front of hood (have been touched up) 

• Stain spot on front passenger side carpet 

• Clock does not function 

• Convertible top header requires repair 

Included 

• Spare tire 

• Jack 

Ownership History 

The South Carolina seller of this 1975 Oldsmobile Delta 88 Royale has owned it since January 2025. 

Additional Notes  

A Broad Arrow Auctions Specialist is working as an agent on behalf of the owner of this vehicle. Broad Arrow Auctions is a wholly owned subsidiary of Hagerty. 

Contact: Tim Rollinger Phone: 912.596.2099 Email: trollinger@hagerty.com