I average out at 120 turns until I hit a wincon on the map type that has the small starting islands, usually before the third monsoon even hits.
So give or take an hour or two if you are speeding through.

I personally think the wincons on default settings are far too easy to reach for some.

Same

引用自 Obim Sol：

How long can games take if you play on the biggest map and max out opponents?

It is diffiicult for me to tell you as depends a lot on the players. There are some users that like to be chill and think every decision while others (and perhaps with experience), you can go really fast. As I was curious I asked our data team in case they could tell me the average (I will tell you once i have the info)