The 91 Town Car is really a great car, however most of these cars will have rear air ride problems. I replaced my air ride with a conversion kit and have had no problems with the car since then. It handles well, rides smooth, and is very dependable. The Town Car has the quality that you expect in a car, it was built to last and I expect to be driving mine still in the years to come. I just wish that the retail value was a little higher that what it is. If you are looking for a good used car I would recomed the town car with the 4.6 V8 I average about 19mpg. I had a taurus and it only got 21mpg. if you put the two side by side I think most of us would rather have a Lincoln.
Power seat, total wheel base, cabin space, trunk space, power windows, locks, etc. Nice trim.
Coil springs rather than air ride, and more cupholders, or any for that mater.