I can't decide between buying a 1990 90, or a 1992 100. Which would you choose?

The 90 has an engine compartment that is a bit too cramped for my personal liking. The '92 100 is the first model year, I would definitely avoid. I have worked on some introductory models and they can be quite costly to service. This is due to some parts that have been superceded with new or improved versions, so a simple repair might require additional parts.

interesting take. thanx.