This. It's cheaper for me to insure a Vauxhall Astra (Diesel), and the fuel economy is almost par on par, but mine is *just* cheaper to run if driving through London, because of no congestion charges, it devalues a lot better, it's bigger, and it's more reliable
You have to consider tax as well. For instance, whilst a Vauxhall astra diesel costs around £100 or so less to insure, it's also costlier to tax (I pay £30 instead of £120/£140) Cars like the Peugeot 107 for instance cost £30 or less to tax (and are VERY fuel efficient, if a bit small and low powered)
I think it also depends from area to area. Weirdly, what's cheap to insure in one area might be more expensive than other cars in another area. Im taking two examples out of thin air
Say in one area a Vauxhall astra is cheaper to insure than a vauxhall corsa. In another area, it might be the other way around.
For me, the second cheapest vehicle I could find to insure was a Toyota Yaris. The absolute cheapest car to insure are the Toyota Aygo/Peugeot 107/Citroen C1
What I like about the 107/C1 is that they are both made by Toyota in the Czech Republic, so everything below the bonnet is Toyota
I've also learnt to take insurance group numbers with a pinch of salt. For instance, the Toyota Yaris and Fiat Punto are both in group 5 for insurance. My Honda Civic (hybrid) is in group 15(?) and the civic, is cheaper to insure than the punto, despite my Civic being more powerful, larger (and also more fuel efficient
)
How many boy racers do you see in hybrids and how many do you see in puntos? So I think part of the car's insurance premium is to do with the "image" of the car
That being said, my Honda civic hybrid is more expensive to insure than the Toyota Yaris
EDIT: The Ford Ka also looks a bit girly for my liking