You guys need to learn from Zombieland... you drive it til it breaks, then steal another that works.
Just make sure it got everything you need.
A) V8 Power
B) Lifted / Ground clearance, nobody wants to get stuck during an Apocalypse
C) Room for guns, ammo, passengers, and anything else you need
D) Wedge, Pushbar, Something better than a Plastic Bumper that can get broken