I work in this field so if you are getting quotes for the uk try these may bring down prices.
firstly easy always say you pay annually, that will take of around 8% (they load for dd because of bad risk data).
always get quotes in the second and third week of the month as they increase premiums at other times eg1 and 4 due to the purchase becoming distressed.
always say you need it today "sales people are greedy" they will push harder but you geta better deal.
car groups can be altered by insurers shop around.
imports prior to 94 dont generally get good premiums.
the group is not definning for price often mention how long you have had a license in full for average is 9 years again better price less risk
adding wifes makes it cheaper in general! thats the only thing that gets cheaper.
hope this helps, if you need more or some decent contacts email me,