Though not a huge interest of mine, I do own a 1990 Buick Regal. This is known in the GM world as a first generation W-body. The series started production in 1988, and ended around 1996-1997. Other first generation W-bodies include the Chevy Lumina, Pontiac Grand Prix, and Olds Cutlass.
Rear suspension is fully independent with a transverse leaf spring.
Reasonable power on the highway and gets about 25 mpg. Must be a Buick thing - though apparently some Cutlasses were also built this way. I think a 2 door car with bench seats is kinda silly. Some notes I wrote on installing an aftermarket stereo and CD changer in an '88-'94 Buick Regal with it's funky dashboard. There was an FE3 option for W-bodies.