No, you do not need a visa to travel from Abu Dhabi to Dubai if you are a tourist. Both Abu Dhabi and Dubai are part of the United Arab Emirates (UAE), and there are no border controls between the emirates for visitors. As long as your passport is valid for at least six months from the date of entry, you can travel freely between Abu Dhabi and Dubai without obtaining a visa.

However, please note that visa requirements may vary depending on your nationality. The information provided assumes that you hold a passport from a country that is eligible for visa-free entry to the UAE. It is always recommended to check with the relevant authorities or your nearest UAE embassy or consulate to confirm the latest visa requirements based on your specific nationality.