Bigger city's

[Steven1982]

---ANSWER PROVIDED---
I've been playing CIV 1 for years. My biggest city is at level 42... Anyone ever had a bigger city? And how did you do that?

 

[Mize]

42 is the limit if your city is working 21 grassland squares with railroad and irrigation on all of them, including RR on the city square (21 x 4 = 84 food; 82 / 2 = 42 pop).
The theoretical limit without hacking is 46, which can only be reached if 4 of the 21 squares are oases, which give 6 food when fully developed.
The top limit is achievable with hex editing. Then you can have a city on all oasis squares produce 21 x 6 = 126 food, enough to sustain a population of 63.

 

[Steven1982]

okay, since I do not know how to "hex edit" (sounds like something I could eat) 42 it is!
Thanks!