Bengtsson got a bronze medal in the Swedish Championships in night orienteering both in 1961 and 1964.[3]
He was part of the Swedish team in 1964 and 1965.[4][5] Bengtsson has competed several times in the World Championships for veterans. He won a gold medal in sprint in 2015 and a gold medal in long distance in 2019.[6][7]
Bengtsson started to promote orienteering in the world in the 1960s.[8] He took contacts with Sven Thofelt in order to make orienteering an olympic sport.[9]
Bengtsson has orienteered in 110 countries. He started arranging orienteering travels in 1961 by bringing 15 orienteers to Switzerland. During the travels he has promoted orienteering. In 1967 he organised a journey in Germany, France, Great Britain and Denmark during 16 days.[12]
In 1971 he got a hundred runners to a journey across Europe during 21 days in July and August.[13]
The main travel is called Höst Öst, where the name indicates a travel to the East in autumn. One of the frequent competitions was the so called 7 November pokal somewhere around Budapest.[17] In 2017 the 50th HöstÖst was arranged.[18] In 2020 the 53rd Höst Öst was organised, however only in Sweden due to the Covid-19 pandemic, from Gothenburg to Västervik passing by Idre, with 11 competitions and 37 participants. Some of terrains are judged by Mats Troeng to be the best ones in Sweden.[3]