The ESP32 seems to even do more MIPS per Mhz that the original Pentium, so it's even faster than a 400mhz pentium would be. Computationally at least

Edit: apparently the Pentium was actually much faster at 64-bit floating point calculations (ESP32 has to do 2 32-bit operations and combine in software), but I don't think that's an issue here

Guess it depends on how tomb raider was written. Even on 32-bit CPUs games like quake were still doing 64-bit math