nah, only the early mk1's came with 1600, then they changed to 1800 in 1982
mk2 8v's are all 1800 (well 1789cc)
insurance companies dont always have the correct data on makes & models of cars
do a quote, but do it for a reg that it wont recognise, then enter the details yourself.
once you get a good quote, then change the reg number to yours