Melee vs. Vehicles, Slicing an engine block in half... Options

[Hand-E-Food]

Hi!

What are the rules for personnel vs. vehicle combat? A scenario: I'm a troll standing in the middle of the road. A van is driving at a building I need to protect. I'm standing in the van's way. I shoot at it as it approaches. As it reaches me, I use a prepared action to side-step it and slice it with my sword.

a) Given the size of the target, does the van get a dodge roll against my ranged or melee attacks? If so, what does it roll?

b) Can you attack something with that much Body and Armour without breaking your sword? If not, what is the sword's limit?

What's your opinion on melee attacks vs. vehicles? Doing the math today, my troll can theoretically dissect a GMC Bulldog Step Van in 3 seconds.

Me: 7 agility + 8 blades (swords) + 3 reach = 18 attack dice, average 6 hits.
Van: 3 reaction + 3 pilot ground craft + 0 handling = 6 dodge dice, average 2 hits. <-- Is this right?
Me: 10 weapon damage + 6 attack hits - 2 dodge hits = 14 damage.
Damage exceeds armour, so damage is physical.
Van: 16 body + 8 armour = 24 resistance dice, average 8 hits.
Van: 16 damage - 8 resistance hits = 6 physical damage.
Van: 8 + 16 body / 2 = 16 damage boxes.
Van: 16 damage boxes / 6 physical damage = 3 attacks.

Is there any problem with this?