Found this great solution by By NCSFan001 on PSNProfiles.
https://psnprofiles.com/guide/5042-homefront-the-revolution-...This trophy will be earned toward the end of the second mission of the DLC, "Alone in the Dark". You will encounter a large room that serves as the main bandit camp, with about 10-15 bandits total in the area including an armored car. You can try to fight your way through like a maniac, but it is recommended to take out as many enemies as possible with stealth. If you manage to do everything in stealth, only about seven enemies will spawn (going loud or getting alerted causes more to spawn). Once you have dealt with the standard enemies, you will have to destroy the car.
You will have access to pipe bombs and explosive barrels to destroy the armored car. However, the game only gives you access to remote detonated bombs (where you place the bomb and then call your phone to detonate). The easiest way to do this is to stand on the main staircase overlooking the car's path and throw a pipe bomb onto its path. When it gets near, detonate (there is a bit of a delay so be cautious). Do this 4 times and the car should be destroyed.