https://kids.guinnessworldrecords.com en

Fastest average speed in the World Solar Challenge

Fastest average speed in the World Solar Challenge
Who
Nuna 3
Where
Australia
When
28 September 2005
Nuna 3 completed the 3,021 km (1,877 mile) 2005 World Solar Challenge race across Australia in 29 hr 11 min at an average speed of 102.75 km/h (63.84 mph). Nuna 3's builders, The Nuon team from the University of Delft in the Netherlands, left Darwin, Northern Territories, on 25 September and arrived in Adelaide, South Australia, on 28 September 2005.