I'm lost on image quality on import and blurryness

I've read the C2 tutorials on image optimization, but it's still something that I've never been able to quite grasp. If someone could explain how I would achieve the following it would be EXTREMELY helpful:

So I have an image of a jeep (39x64) in Inkscape. If I zoom in and out in Inkscape the image loses no quality. However when I import the .png file into Construct 2 it looks fine at first, but when I zoom in to get the 854, 480 window size to fill the layout screen the image looks blurry. Using Letterbox Integer in preview mode has better image quality, but it's not full screen like Letterbox Scale, which has lower image quality. How do I prevent from having blurry images?

Imgur link for visual (letterbox integer on left, letterbox scale on right) http://i.imgur.com/LADjfSV.png

Inkscape is vector format not bitmap..

If you want to have your image look better while bigger, you could export from inkscape at twice the size..

Does look better, thanks