Car weights

As I read the club magazine and see adverts for potential tow cars, I ask myself why does the club not insist that the manufacturers publish their kerb weights? After all, the kerb weight is one of the most important figures for towing. I often see figures for MPG, CO2 and BHP, but never the weight.  I invariably have to dig around to try and find out if the car is heavy enough to fulfill the 85% guidelines for my Caravan.

I am aware the weight of a vehicle can vary greatly dependent on specification, but a range of weights would be useful.

Is this wishful thinking? Is there a logical reason as to why we don't see these figures in a Caravanning magazine ( and it's not just the club magazine, the same case applies to the commercial Caravanning magazines as well).