Agree with Sdogar regarding the AC part. I've had my swift for more than three years and haven't had a gas top up yet, I haven't even changed the cabin filter, I clean it every week and AC is brilliant. I drive the car alone or with one passenger, so I keep the side vents closed and only use the mid vents, results in even more throw and foggy glasses these days whenever I step out of the car 
However, regarding low RPMs, I disagree. Swift is a bit sluggish below 2400 RPMs. Usual driving is between 2500 to 3500 so not an issue, but I have a bad habit of changing a bit early sometimes which often takes me to 2000 or 2200 RPMs. It feels a bit choked there and at 2400 RPMs, I notice a slight, barely noticeable improvement, as if the car is breathing better. Above that its great.
Sent from my GT-I9300