Well, my first computer was a v.32 (V dot 32) which was the generation before the 8086 processor. I believe that it was running at 6 or 8 Mhz. My computer today (i7) has 4 cores which each run at 2.8Ghz (11.2Ghz total).
If I’ve done my math correctly, my current computer is 1911.4 times faster than my first one (assuming my first one has a 6 Mhz CPU, 1433.6 times faster if it had an 8 Mhz CPU). Also remember those old computers didn’t have math co-processors built on so that kept them running even slower.