1. It was a very brief rivalry. Very. 2. They really only spent a season or two on cars that were close on terms of performance. 3. Lauda supported the view shown in the movie Rush. 4. Lauda had many other rivals. He was in F1 for a long time. But somehow the received wosdom is that his main rival was Hunt. 5. Hunt and Lauda were close when racing pre-F1.