Welcome to the site.
You must come from owning and driving v6 or v8 engined vehicles. I've never daily driven a car with larger than a 2.0L engine (I have of course driven them from time to time), and I'd never say they're very low power. I'd say they're more than adequate to get me from point A to point B. You'll get used to it and I see you already are. 45 mpg is a pretty good start!
