Are you talking about a 1950’s Vespa or a 2026 Vespa?

A modern 300cc four stroke Vespa will use 3.3 litres of fuel per 100km and Euro 5 means noise is quiet.

As far as things go, modern scooters are great, practical, economical vehicles.

Even the new ones are awfully loud.

But, yeah, they don't smell like the old ones thankfully

Euro5 also means >90% less exhaust fumes compared to Euro1 which was introduced 1999 iirc. The difference between a 1950 and 2026 Vespa must be huge.