At 480 km/h (about 300 mph) 0.4 megajoules per passenger mile, all things combined including power to track, according to Stanford. Also apparently the energy needed increases at lower speeds due to something about lift.
Jet airliners are surprisingly efficient, commonly requiring around 2 MJ/pkm (=3.22 MJ/pmile). With full flights and the latest airplane designs, they can do it at less than 1.5 MJ/pkm (=2.41 MJ/pmile)
So 6x is still a big difference. Not sure what I expected, but maybe this is smaller.
At 480 km/h (about 300 mph) 0.4 megajoules per passenger mile, all things combined including power to track, according to Stanford. Also apparently the energy needed increases at lower speeds due to something about lift.
For reference https://vaclavsmil.com/wp-content/uploads/2019/03/January2019.pdf says
So 6x is still a big difference. Not sure what I expected, but maybe this is smaller.