i've never understood how insurance is worked out, 2 years ago i had a quote for a jaguar x-type 2.2D and it came up at £1,500. i also got a quote for a 1.6L Vauxhall Astra which was £1,875 from the same company. Yet my car at the time, an Audi TT 1.8T modified from 225bhp to 310bhp came in at...