Axio 1.5 is mated with a cvt transmission thatvis why it gived around 12-15 kml in city depends on your driving style
Premio if you are talking about old shape 2002-2007 than 1500cc will give you around 10kmpl in city max and 1800cc should give max of 8 kmpl in city with ac thats low because of having the conventional 4 Speed auto transmission
Now if we talk about new shape premio both varrients have cvt tranny and I have kept 1800cc one it used to give me 14kmpl in city with ac and light foot never tooked her on long
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