If a car comes to a full stop when hitting a haystack and hitting a stone wall which has the greater momentum?

If the car comes to a full stop when hitting a haystack, then it has greater momentum when hitting the stone wall. This is because momentum is the product of an object's mass and velocity, and if the car stops in a shorter distance when hitting the haystack, it must have had higher velocity (and therefore momentum) compared to when it hit the stone wall.