Just a bit off-topic:
The 486SLC is indeed a 486 class chip but with the 16-bit bus of the 386. Hence it's not all that much faster!
And the KCS PowerPC board is an NEC V30- not an 8086 at all. It's not compatible with the 286, but it's clocked at 10.7MHz (a lot more than an 8086) and actually has a full
Z80 emulation mode in it, so you can run CP/M on it faster than any other CPU of its time AFAIK.