Tim, this one is the airplane version. They have a car engine too. This one is roughly 15 - 20% stronger than the .15 LA, I'm guessing. The .15 LA is no slouch, either. It runs great, but it is pretty expensive. It was a gift. If I were shopping for a low priced, .15 sized screeamer, then I would have to give strong consideration to the K&B .18. Check it out.