The new record was set by Gunnar Garfors, 39, Tay-young Pak, 42, and Oyvind Djupvik, 38, after they made it to 19 countries in just 24 hours, surpassing the previous record of 17 countries.
The travellers began their record trip at the border between Greece and Bulgaria at midnight last Saturday, 'The Local' reported.
"It was a fantastic journey. We smashed the last record by two countries, and are extremely satisfied with the effort," Garfors said.
"It all went smooth, except for a horrible rainstorm in Switzerland, and some problems with a rental car in Greece," Garfors said.
Oyvind was the dedicated driver and Tay was responsible for rations during the trip.
The group did not have time to stop for meals, so they ate sweets, sandwiches, salts and energy drinks.