What we see here is a rather strange FH of the previous model. The cab sits a lot higher and there is something going on in the front of the cab. A closer study learns that this was a test to see if it was possible to make a flat floor in the Volvo cab. As we all know this never went in to production but it shure is interesting to see things like this.
The other truck you see here is also a study model that never went into production. The streamlined cab with the set back front axle looks like a serious studymodel from the early ninetees.