what i would think is

1.) it could be because integras have an extrmely high theft rate i think higher than civics now.
2.) Maybe depending on the cars color some insurance companies look at stupid things like that.
3.)its a sports car they know its a possibility that ull try to race it(not to say u will but they do assume.).
4.)How much driving experience do you have? my friend owns a 2004 BMW 325i and is only paying 3000 full coverage for a year and he's only 21 but because he was driving since he was 16 he got a huge discount.
5.)Is it a standard? they get u on that too since they believe that standards are faster.

I drive a 91 integra and i pay 2700 liability and thats simply because i am only 21 with 1 1/2 years of driving experience also it is a cherry red sports car that is a standard transmission.

ihope that info helps