So I bought my Mazda 3 SP25 new 11 months ago for $25k.
I got NRMA comprehensive insurance without really thinking about the cost since they seemed on the level on my previous car (KIA Rio).
Not really thinking about it, I insured it for the price of purchase. And they quoted me $1100, which I accepted. But now that I'm thinking about it, should I be insuring it for the RRP of $31k?
So is $1133 too much? I just read that 24yo guy who's buying a Mustang got quoted $1300 and he thought it was too much due to his age. I'm 35 and the Mustang must attract a much higher premium.
EDIT: OMG Stay the hell away from Youi! They made me fill out their form without giving me a quote and then called me and asked me the exact same questions which wasted 15 mins! Only to give me a quote of $2500!!! WTF?!
When getting an insurance quote, there's so many factors that need to be taken into account. With that in mind, you simply won't be able to do comparisons of premiums.
As an example, it could be that the data they have shows that 50% of Mazda SP25's get stolen and only 1% of Mustangs get stolen. And hence they'll factor the higher potential recovery costs into the Mazda quote.
Your best option would be to get as many quotes as you can from different companies to do the comparison.
Just remember that the insurer with the cheapest premium may not be the best. They'll all be happy to accept your premium payment, but when it comes time to paying out, it could be a different story.
Remember to consider the post-claim customer service. Some smaller insurers will even force you to pay the relevant excess upfront at the time of a claim regardless of who's at fault. Other thing such as choice of repairer etc should also be considered at the time of purchasing the policy.