In Gurps, how powerful do you need to fight a tank?

[Bathawk]

Oh an additional thought or two...

What about prying the hatch open/off?

And I don't think you need to "explode" a tank to "kill" it right? If a punch is hard enough to cause a serious dent or hole in the vehicle wouldn't the kinetic impact cause a "kinetic kill" effect on the occupants? Or cause enough "internal injury" to the tanks mechanisms?

(Would also ask about HESH type attacks, but think that's a bit baroque for a supers campaign)