Though I've always seen Volvo's brochures claim a 1375 kg weight for my car - including a 75 kg driver and fuel - the official weight on its registration papers says 1408 kg.
Official weight here means ready to roll, all fluids filled up.
As I had it weighed at an official testing station, they can't but add the weight of the fuel when the tank is near empty (as mine was, trying to go over 1000km)
The result is that it weighs 1410 kg with a full tank, so it's still very near its official weight despite the 25+ kg of stock items I had already taken out, without a driver inside
