1987 Cadillac Brougham 5.0L Olds 307 from North America
The performance of these 8 cylinder engines make me want to pull my hair out
Gaskets leaking oil in several locations, leaky fuel pump, bad carburetor float, Overdrive clutch faulty (NO 4th Gear), no downshift due to low HP ratings.
Nice American luxury, that's very cheap & reliable. However with a curb weight over 4,400 lbs the engines of the time were far less than adequate to propel the beast to 60 mph. 0-60 times are almost diesel-like at around 12-15 sec. Car may perform better with polution devices removed, but will produce pungent exhaust odors & will consume more fuel.
Would you buy another car from this manufacturer? Yes
Review Date: 13th December, 2006
14th Dec 2006, 17:20
Taking the emissions equipment out makes little to no difference. It was done to the 305 in my '87 Caprice and it performs no better.
25th Oct 2010, 00:55
The 1980-1984 Oldsmobile 307 V8 was a fairly decent performer.
The 1985-1990 Oldsmobile 307 V8 was total garbage as far as performance and acceleration goes. It's too bad Cadillac decided to use this motor under the hood of a 4000 + pound car. Some of the Oldsmobiles had a higher output version that was much better (Cutlass Salon and 442 used them), and I think a few went into some of the big body Cadillacs too.
A little known fact about the 1985 and newer 307 V8 was that they used different cylinder heads than the older models. The newer heads are stamped 7A instead of 5A. They had roller valve lifters that made the engine smoother, but even smaller intake and exhaust ports, making the engine even more anemic. It was nearly as bad as the early 1980's low torque 4100 Cadillac V8 boat anchor.
I had a 1986 Cutlass Supreme with a 307 20 years ago, and one of my neighbors had a 1981 Buick Estate Wagon with a 307. The Buick was nearly 1000 lbs heavier, and would run circles around my Olds.
If you are looking for a big body Rear Drive Cadillac Brougham, De Ville, or Fleetwood, look for a 1977-1979 with the Big Block 425, or a 1990-1992 with the Fuel Injected Chevy 350 or 305. Even the 305 is a world of improvement compared to the 307. Avoid the 6.0 liter 368 (V-8-6-4), the Oldsmobile 307, and the 4100 Cadillac V8 at all costs.