Not a Kia but I had a rental new style Asta SRI which turned out to have a 999cc turbo engine. The turbo was about the size of a grapefruit.
Wasnt terrible in normal mode and when you pressed the sport button it was actually pretty good and like a little jack russell in a “let me at ’em” kind of way. It just ran out of puff quite spoon…in a jack russell kind of way which meant you really had to be sure you were going to get past if going for an overtake.
Being a vauxhall you just had to make sure you switched off sport mode before you got to a bend as the steering feedback on the limit was terrible.
MPG wise it was getting about 40 I guess on my commute. My old 306 HDI would do the same with me ragging it silly and my current E-class does 40-50mpg depending on traffic and how much I use the gas. And that car is much nicer to overtake with as it just keeps pulling with 2 proper sized turbos.