Not OP but searched up EE’s video on a topic like this. Been a long while since I watched it so I don’t remember much about it in description is the sources. So at the very least you can check some of that type of stuff.
https://youtu.be/6RhtiPefVzM?si=_i0p3AQftvmqXcal
But yeah in general an ICE is horrendous at efficiency vs electric. An ICE blows some 70+% of its energy on making heat we don’t use but instead actively use some of the available energy made to cool it.
I put on my robe and wizard hat.