A lot higher, double, triple or ever more. Depends on the CO2 emissions of the particular vehicle so bigger engine, more power, more weight, less aerodynamics, higher consumption means higher taxes. This is of course for combustion vehicles ...don't know about the EVs, never owned one
"If you buy a more expensive car ..."
Oh and by the way, the vehicles price has nothing to do with emissions and so on.
Of course that was meant figuratively, I thought that was clear