I’m not sure of the petrol consumption or propensity to pollute of the old Volga models, but they look tough.
Minsk has plenty of examples of the GAZ-24 (1968-92). Here’s a newer one (note the plastic grille and recessed door handles):
And an older one, in particularly fine shape:
Here’s a still older model (1962-70), a GAZ-21:
And a couple of lorries for good measure:
In case you hadn’t noticed: in Minsk, even the lorries are clean.