Engine power

Hello everyone! I’m new here in the forum and I have a few questions. I bought a week ago ’95 Omega Caravan 2.0 16V. Has run 125tkm and is fine except for timing belt change (comes tomorrow). Today I drove a little overland to get a feeling for the car. I had to find out that the engine is a little weak for its high weight. Now my question: Are there sharper camshafts, increase in displacement or other useful tuning measures? How about h more compaction and channel processing? Greetings and thanks!