Hi Richard,
I was involved on the Mk1 versions that the army ordered for range work, and they were awful on metaled roads as they were fixed wheel stations, similar to an Argocat. I recollect it was a Citroen engine and transmission. Once out on grass or earth it was OK, but on the ranges where it was beach they struggled to turn. I remember they were delivered by rail to the local goods yard and we drove them about half a mile back to the workshops, not something you could do roadwork with. We were not impressed by them. It all changed with the later ones, Mk2 as they performed better on hard roads.
regards, Richard