Insurance seems to have got technical, taking into account not only "your" age , driving / claims history, vehicle engine size etc.
A lot of it now seems to be weighted to the potential cost of repair / writing off.
I was toying with getting a 1985 LR pickup. Put it in an insurace search as an additional vehicle for me (cant use no claims on two vehicles) and named driver for a 17yr old girl, just passed test, and the quote was under £300.00.
Same specs with 2010 Ford Galaxy about £600
Same specs with 2016, 1.5l focus over a grand.
At the end of the day, if they see your vehicle being a risk (not you) the premium will be high regardless of where you look