The 828 used a VW 1600 aircooled engine (running on alcohol) and nowadays is being continued modernized by the name of "OBVIO!" (obvious).
The old one:







The new one:



I think it's damn FUGLY, but anyway, it is practical...
More info on the 828 and Dacon history you can all see at the OBVIO! site:

http://www.obvio.ind.br/