The J-cars (cavalier/sunfire/sunbird) existed b/c of the second oil crisis in '78. GM needed something FWD, smaller than the X-cars, that could get better fuel economy than the RWD V-6 and V-8 cars it had been selling in the '70s. The thought was that people in the US would buy these because they had to, not because small cars would suddenly become appealing to Americans in their own right.
The Js were never terribly profitable, the lower-end ones were almost certainly sold at cost to boost the company's mileage compliance numbers. The traditional easy way of squeezing costs out of a car is to pull them out of the interior & trim, which would explain the sunroof, the dash electronics, the trunk closures and taillights.
The engine you got in yours is almost certainly the Quad OHC, one of the last Oldsmobile powertrain designs...in its original 2.3L config, Olds had it making 185hp (in 1989, with no turbo!). Powerful but with no balance shafts, it pulled well but sounded & shook like a pair of wolverines trapped in a dryer, which is why the 2.4L version got balance shafts and was detuned to 150hp.
My then girlfriend had a Sunbird. She was a very nervous driver. I thought it was part of some other psychological issues she had. Then I had to drive her Sunbird somewhere. Terrifying! Somehow in a noisy gutless cramped smallish car GM had managed to reproduce the floaty uncontrolled body motions and vague imprecise steering of the full size cars of a decade earlier.
It might sound crazy, but according to one of Bob Lutz's books, there is/was a huge corpus of GM Engineering Standards, some of which dated back to the 1930s, that had a big influence on design. This might explain why a compact Pontiac Sunbird might feel like a fullsize 1979 Pontiac Parisienne-both cars might have to meet the same set of criteria regardless of market fit!
<pedantry>
Replying to myself: the 2.4 in a Toyota Cavalier would be an LD9-series Quad 4, not a "Quad OHC" which was an earlier L40-series SOHC version of that engine.
</pedantry>
The J-cars (cavalier/sunfire/sunbird) existed b/c of the second oil crisis in '78. GM needed something FWD, smaller than the X-cars, that could get better fuel economy than the RWD V-6 and V-8 cars it had been selling in the '70s. The thought was that people in the US would buy these because they had to, not because small cars would suddenly become appealing to Americans in their own right.
The Js were never terribly profitable, the lower-end ones were almost certainly sold at cost to boost the company's mileage compliance numbers. The traditional easy way of squeezing costs out of a car is to pull them out of the interior & trim, which would explain the sunroof, the dash electronics, the trunk closures and taillights.
The engine you got in yours is almost certainly the Quad OHC, one of the last Oldsmobile powertrain designs...in its original 2.3L config, Olds had it making 185hp (in 1989, with no turbo!). Powerful but with no balance shafts, it pulled well but sounded & shook like a pair of wolverines trapped in a dryer, which is why the 2.4L version got balance shafts and was detuned to 150hp.