A319 flight crew reported a Ground Conflict with ramp vehicle during taxi out.

Narrative

After pushing off of gate XXX and being dropped at spot 'X' for engine start; we began to taxi forward towards spot XX as assigned by Ramp Control. As we approached starting point 'V' I noticed a small white equipment tug traveling in the opposite direction in the ramp road lane on our right. I initially thought he would continue straight (opposite to our taxi direction) as we were already close to the ramp road lane that crosses the ramp at point 'V;' however instead he turned right (now heading north) in the ramp lane that crosses at point 'V' - thus turning to cross in front of my aircraft. I assumed seeing the aircraft he would stop; but instead the driver shifted his eyes to look towards the cockpit; and then instead of stopping the tug quickly accelerated across the lane. Due to the close proximity of the tug; I was forced to aggressively apply brakes to avoid collision. Though the flight attendants were still moving in the cabin; none were injured. After stopping the aircraft I notified Ramp Control about the incursion and asked them to review ramp camera tapes to if the tug could be identified. Ramp indicated they would try to trace it down.Driver turned toward a moving aircraft that was already too close to the crossing lane. Then; after briefly shifting eyes up toward the cockpit; accelerated across the lane instead of stopping. This incursion appeared to be intentional noncompliance.Suggest company owning the tug be contacted and require driver to complete safety training with emphasis on motor vehicle operations on the aircraft operations area.