This info is from a late 1990 VN handbook.
The VN V6 executive sedan weighed 1311 kg, The VN V6 executive wagon weighed 1359 kg,
The VN V8 executive sedan weighed 1426 kg, The VN V8 executive wagon weighed 1436 kg,
The VN V6 berlina sedan weighed 1370 kg, The VN V6 berlina wagon weighed 1422 kg,
The VN V8 berlina sedan weighed 1468 kg, The VN V8 berlina wagon weighed 1502 kg,
The VN V6 calais sedan weighed 1395 kg,
The VN V8 calais sedan weighed 1483 kg,
The VN V6 ute weighed 1312 kg,
The VN V8 ute weighed 1379 kg,
These are all with a full tank of fuel.
I have a very early 1988 VN handbook which doesnt even mention the V8 engines or ute stuff in it.It shows different weights again.
Executive sedan V6 weighs 1312 kg, Executive wagon V6 weighs 1338 kg,
Berlina sedan V6 weighs 1358 kg, Berlina wagon V6 weighs 1415 kg
Calais V6 weighs 1386 kg,
Full tank of fuel as well.
Interestingly the long range fuel tank in the first VN's held 85 litres,the later VN's held 80 litres.Both normal tanks held 63 litres.The wagons and utes held 68 litres.