Yeah, I was looking at my subaru 360 history and that was one of the historical experimental Subaru 360's that was made to prove a point.
Odd that a 2 cyl motor driving a bullet car would get 100mpg eh?
(although its the bigger 2cylinder than the 360 had from a rex, that was a typo apparently)
Might be interesting to contact that site as there are apparently a few old foggies still there who worked on the car.
A Peek in the “Attic” – Part Two
(more on it but not much)
Tucker '48 Automobile Bulletin Board • View topic - Alex Tremulis car that made 100 miles per galon!
Best description here
RONGINEER - Automotive Product Design & Development