It is a pretty easy mistake to make if you are used to how fast new processors come out now, but you comparing an i386 from 1991 to to a 68020 from the mid 80s.
In 1985 when the 386 came out I believe the fastest speed you could get was 16MHz. They added higher speed variants for years afterwards. Intel made a 40MHz 386 in 1991 that was strictly aimed at embedded users who want more perf but were not ready to move to 486 based designs (386CX40), I doubt almost anyone used on in a PC. AMD made a Am386 at 40MHz which was a reverse engineered clone of the 386, but again that came out in the 90s (the big selling point was that you could reuse your existing 386 motherboards instead of replacing them like you needed to for a 486).
In 1985 when the 386 came out I believe the fastest speed you could get was 16MHz. They added higher speed variants for years afterwards. Intel made a 40MHz 386 in 1991 that was strictly aimed at embedded users who want more perf but were not ready to move to 486 based designs (386CX40), I doubt almost anyone used on in a PC. AMD made a Am386 at 40MHz which was a reverse engineered clone of the 386, but again that came out in the 90s (the big selling point was that you could reuse your existing 386 motherboards instead of replacing them like you needed to for a 486).