Cars are larger, safer and have considerbly stiffer chassis's. Bolt on all the extra's we all must have and the result is much greater weight.
Golf Mk1 - 3.7m x 1.6m
Corsa C - 3.8m x 1.65m (hatch)
Which model is a Corsa C, Mark?

The last one, Corsa D (current) is bigger still (4m x 1.7m)
Interestingly, Brazil id full of Corsa saloons, something we never had in europe
We did have the Nova saloon though.My dad bought a brand new one in chocolate brown for some unknown reason.

I noticed something about the weight of cars recently.My trolley jack doesnt normally go under the sill of an Omega.I have to lift the car about an inch and then kick the jack under.This was the case with the Omega Im dismantling until I removed the interior and a few other parts.Then the jack went straight under the sill without lifting the car,so the weight of the interior and a few other bits allowed it to rise up a good inch on the suspension.