Re: Graham Dawson Terry 14 There is no innocence
In fact yes, an 80s Fiat is more resilient than a modern lorry, in the same way that I could leave an old mini mayfair sat out on the street for a year without moving it and be able to drive away without issue, yet I couldn't leave my 2003 ford focus out for a year without having to spend a fortune having it repaired. Never mind the diesel in the lorry's tank turning to sticky sludge or the engine seizing up from lack of use, the ECU will be knackered, the electrics will be shot and the tyres will be ruined from sitting so long.
Those trucks you mentioned that the army keeps? They maintain them. They regularly turn over the engines, roll the wheels and clean the bodies, and air out the various bits where stale moisture will trap and corrode things. They change the oil, occasionally pump and replace the fuel, replace the wheels and test the electrics to be sure they're in working condition. They don't just leave them sat out in a field without touching them.
That aside, your fiat was built to very crude tolerances. Modern vehicles aren't. Even a 1980s lorry would have had a finer tolerance in its manufacture and would be much more vulnerable to environmental effects without regular maintenance.
So yes. Your fiat could survive conditions that a lorry would not tolerate, but only because it was made of rust and string to begin with.