[Whyman]

You are correct on the figures giving a towing limit of 2000kg so your Aurora should be a OKish match for your V70. The only real way to find out the kerb weight is to put it on a weigh bridge. Every time an extra is added to the car spec it increases the kerbweight. Base figures on the internet are often for manuals and as yours is an auto it will weight more. Even things such as the Tempra spare wheel will increase the kerbweight.

As you have said the nose weight of the caravan is 85kg and there should be a similar figure quoted on a plate on the towing bracket, mine on my XC60 is 90kg and the lowest of the two is the one to use. If there is not a plate on the towbar then you need to go back to the towbar manufacturer.