Size of normal tent and large tent

Hi folks!

I found out that the lengths of the big tent and the normal tent are the same.
Big tent: Vol. 10l Length 90cm
Tent: Vol. 2.5l Length 90cm

The normal tent dosen’t fit in a large backpack. Thats not realistic. I want to go on a roadtrip with my tent, sleeping bag and a gun.
The length for the normal tent should be around 20-30 cm imho…

What do you think?

My small tent is about 45cm long. I think it’d be fine to change it.

Should be fine as long as it fits in a bigger backpack!