Needs rebuilt carburetor.
Gas gage does not work.
Speedometer does not work.
Driver's side window does not work.
The car guzzles down gas, especially if your driving short distances.
The car is very comfortable, it's hard not to fall asleep while your driving it.
Great engine, it will last forever.
Handles great.
So you don't know what engine it has? Well there were three engines avalable on the 1984 Oldsmobile Delta 88 Royale so lets see: If it's a V-6 (which it probably isn't) it's a Buick 231 Cubic Inch (3.8 Liter) with 110 Horsepower, If it has a (gasoline powered) V-8 it's an Oldsmobile 307 Cubic Inch (5.0 Liter) with 140 Horsepower, Or if it has a (diesel powered) V-8 it's an Oldsmobile 350 Cubic Inch (5.7 Liter) with 105 Horsepower.
I'm sorry to advise that the above comment is wrong. The 1984 Olds Delta 88 had 150 hp. It was only downgraded in 1985 to 140. Check it out experts.
Note: A Comments RSS Feed 
is available. New comments appear in the Members Area before the main site