I remember that. It was seen as a bit sleazy at the time by the people I worked with. I had a 386SX....a 286 PC that was designed to be upgradable to 386. If my memory is right, that was about the time that the first usable (to me) version of windows came out, 3.1. Windows didn't handle memory very well back then, but it actually did multi-task better on a 386 than 286, so the 386sx seemed a pretty good deal to me at the time. Anyway, 386sx was, again on memory, a 386 processor with the bus size of a 286, 16 bit. Since IBM/MS were still running the memory effectively like 8 bit micros back then, it made some sense.
Motorola built much better hardware at the time, but business decisions usually aren't based on engineering or quality. Not in that industry in this country, anyway. My cynical 2 cents...