As a result, the last big Oldsmobile convertible was our featured machine, the unapologetically full-size Delta 88 Royale ... 400-cu-in V-8 and four-barrel 455-cu-in V-8 were optional), GM ...

I've rarely come across such a rare Oldsmobile ... The mint Delta 88 Royale convertible rolled off the assembly lines with a 455 V8 4-barrel engine paired with an automatic transmission.

Introduced in 1949 and produced through 1999, the 88 ... 1974, only 2.3% of the cars rolled off the assembly line with a soft top. As a result, Oldsmobile announced that 1975 would be the ...