From the back cover:

Car Wars - Deluxe Edition includes a comprehensive 64-page rulebook with complete directions for building, arming, and driving your own vehicle; full combat rules, including a special introductory "quick-start" version (new in this edition); and all the skills you need to create your own "autoduellist" character. Here are all the rules from the original Car Wars minigame and the first two supplements, newly edited and reorganized, plus sections on off-road travel, speeding, car trailers and more.