City engine emission is actually not only euro 2, but sad case in Malaysia:

"For optimum performance with Malaysia’s low-grade fuel, the engine has been tuned only to Euro-2 emission standards."

Quoted from motortrader..

It's possible to have euro 4 emission for city too, but until ron95 fuel upgraded to euro 4, there's no point arguing about engine emission standards, and majority of buyers just don't care as well..

In Philippines, the same 1.5l i-vtec sohc engine in city meets euro 4 emission standard.. so it's possible for honda malaysia to tune the engine to meet euro 4 standard.. just for our country honda tunes the engine for euro 2 since our ron 95 fuel just euro 2.. n I don't deny that an engine can accept lower grade of fuel, I just said for optimal performance.. sure an euro 4/5 engine can achieve optimal performance with corresponding euro 4/5 fuel right?

What are the models with euro 3 engine u mean? Are the models u mean full new models after nationwide Euro 4m ron97 implementation in malaysia last year?

Not sure about jazz emission standard in malaysia.. can't find in the specification in honda malaysia website.. anyway just discussion.. no offense..

That's the thing I want to point out.. manufacturer can tune the same engine to meet emission control of respective countries.. so it seems inappropriate to rate an engine good or bad based on emission standard.. your reply is short and precise..