This is probably something more for modders and likely out of scope for the vanilla game, but I think it's an interesting idea that could be explored. The big bad thing that everyone loves about this game is the destruction. duh >.< Because of that game modes like tight bumpy rally racing and demo derbies are pretty well cemented in the gameplan. So why not take it up a notch or two? Lets just say I want a large metal axe on my hood that smashes it's fury upon unsuspecting opponents, or a few spikes attached to my rear bumper to make those who sneak up behind me regret their decision. I'm talking junkyard wars style robot car derby madness. This idea is demonstrated well in the Combat Cars episode of Junkyard Wars. I couldn't find a clip on youtube but google, it's your friend. I feel like this kind of focus on destruction would show off the engine well and is a good complement to the havoc that can be wreaked on the cars. There would be issues like building (how would you build these crazy junkyard weapons onto a car?) and weapon variety so I think this kind of thing is really better suited to modders while the devs focus on the important bits, but hey if it gives anyone ideas that's cool too. Tell me what you guys think, and if you'd want it.
Having mechanical weapons such as that axe you described, as well as vehicle armour is certainly possible. There is a demo derby version of the Moonkawk which has a concrete block hanging off the back of it, as well as some armour. Naturally, community mods like this will become more common and more advanced as time goes on, it's just a matter of finding someone who is willing to make it happen, and knows how to do it
so beamng with a little carmageddon thrown in? im in, ofcourse getting people to make thease type of wild vehicles is another story...