I was actually surprised by the results, but maybe not in the way that most people would think. I avoided the 4.77MHz PCs because my (self built) 4MHz Z80 mach

I was actually surprised by the results, but maybe not in the way that most people would think. I avoided the 4.77MHz PCs because my (self built) 4MHz Z80 machine consistently outperformed them. I used IBM PCs at work and they were fine. The extra memory was awesome, but the speed of running applications was never in question. My Z80 was always faster. The 16-bit instructions of the 8088 required two bus cycles to fetch, while the 8-bit instructions of the Z80 required only one. Memory bandwidth was comparable (4116 dynamic RAM) and caches did not yet exist, so the Z80 always won. I did not "upgrade" my home computer until the 386(SX) could emulate the Z80 faster than the Z80 silicon could run.