Driving in Portugal can be an enjoyable and convenient way to explore the country. However, it’s essential to familiarize yourself with the rules of the road and understand the local driving conditions before hitting the streets.
The minimum age for driving in Portugal is 18 years for cars and motorcycles. However, rental car companies may have different age restrictions.
Americans and nationals of other European Union countries are allowed to drive in Portugal with their local driving license. Provided they aren’t driving longer than six months (185 days according to the U.S. embassy in Portugal) If you want to stay longer, you have to apply to the Portuguese Customs authority to have the car legally imported.
There are several international and local car rental companies operating in Portugal, including major brands like Hertz, Avis, Europcar, Budget, and Sixt.
⇒ Also сheck оut мore info: *Driving in Portugal (wikivoyage.org)