Why is the object not destroyed when touched?

Question

Unity

Box Collider set up, object specified

using UnityEngine;
using System.Collections;

public class Enemy : MonoBehaviour {

  public GameObject Car;
    void Start () {
  }
  
  
  void Update () {
    if (Vector3.Distance(Car.transform.position,transform.position) < 1f)
    {
            Destroy(Car);
    }
  }
}

Answer 1

Well, colliders have nothing to do with it at all - you don't use them in your code.
And not destroyed perhaps because the distance never becomes <1. The distance is measured from the center of the object - and if each object you have is 1 - then the distance will be <1 when they are half inside each other.
The way out is to use colliders.