Smaller CC with a big car actually consumes more fuel. Altis sized car needs to be 1.8cc to be pratical. And i dun see how maintenance can be more expensive between a 1.6 Altis and a 1.8 Altis....parts are more or less the same....engine oil also should be around there, maybe just a little bit more.

I can tell you Forte 1.6 is very underpower. No syiok at all....especially the 4 gears AT. Feels like driving my old KIA Sephia.