> Acorn produced a 32-bit CPU with a 25k transistor count. The 80386 was years later, with 275k transistors

Coincidentally, ARM1 and 80386 were both introduced in 1985. I'm a big fan of the ARM1 but I should point out that the 386 is at a different level, designed for multitasking operating systems and including a memory management unit for paging.