Dental insurance and plans?

Could  insurance  be correct that 2door-car more expensive to guarantee than 4door-automobile?
"Hello"I'm 21 yrs old man and I reside in NJ. I am contemplating funding it and purchasing a car that is used. I looked at GEICO website and the offer arrived to about $ 1600/yr for 2000 honda S2000.  insurance  had been wondering if that sum is not amiss