I found a couple of similar questions, but no one that really answered my question (e.g. Transiting in Abu Dhabi (UK passport) for 20 hours, is this itinerary possible?, Can I leave Abu Dhabi airport while on a transit?)
On a Friday at the end of November, I'll arrive at Abu Dhabi, Terminal 1 around 7 pm. 7.5 hours later, my flight to Europe leaves from Terminal 3. Are these 7.5 hours enough to travel to the city, have dinner there, and come back to the airport in time? I heard that the lines at immigration and security can be sometimes quite long, particularly on weekends.