Driving from Lisbon to Porto is absolutely worth it if your goal is to see the "real" Portugal between the two major hubs. While the high-speed Alfa Pendular train can get you there in under three hours, a car allows you to explore the Silver Coast and the interior. You can stop in the medieval walled town of Óbidos, visit the massive monastery at Alcobaça, or see the giant waves in Nazaré. Further north, you can detour to Coimbra, home to one of the world's oldest universities, or the "Portuguese Venice," Aveiro. If you drive straight on the A1 motorway, the trip takes about three hours and is quite easy, though the tolls can be surprisingly expensive. However, the true value of the drive lies in the flexibility to stop at a local tasca for a slow lunch of grilled octopus or suckling pig in Mealhada. If you are strictly on a schedule and only want to see the two cities, take the train; if you want a curated Portuguese road trip experience, the drive is a high-reward choice that offers sights the train simply cannot reach.