Cav Durbo's range from group 8-10, BUT its more of an "old man's" car (sorry spud lol), where as 1200 Novas usually have a high claim rate against them.
I would say so long as the cav remains standard you should be looking to pay a similar price. They may try to rape you a bit as you're changing cars mid term, although at your age you'd be best to take the hit so that you don't lose out on a years NCB.
Plus, the money you'd save on fuel will soon recoup any hike in insurance IMO.
You can always ring them up and ask for a quote of course.
