my own assumption. City,Corolla XLI and GLI are not underpowered at all. we are only talking abt family sedans not sports cars:-#
its a personal choice which car you feel comfortable with. obviously if you compare it with city it generates slightly less power.
City=73KW/6000RPM as compared to
Reference from honda Pakistan and Toyota Pakistan own sites:
Honda | Pakistan | CITY | Specifications
Indus Motor Company Limited | Home
however for use as a family car(majority of cars used here are used as family cars) corolla performance is extremely well.
Now the issue of cng, city and corolla are not tested on cng and are meant to be driven on petrol hence we get bizzare experiences from cng in both cars, perhaps in future, furter improvement in cng kits and accesories may make this problem go away.
In cities (30-40% of our roads) since there are less pot holes and proper roads City performs very well but once you take city to villages(60-70% of our roads) its hard suspension does make you uncomfortable. on the other hand you may not appreciate corolla till you you travel on village roads frequently, thats where you love corolla.