Well, I'm puzzled as to 'resolving power'. The images I've taken so far don't look to me as sharp as those made with my digital camera. Wondering whether it's the lens, the camera, the exposure, the film or my developing. Or my scanning. Too many variables.
IMAGE LINK: https://flic.kr/p/LHMJV3 Sunrise at Dinosaur National Monument by Edward Jenner, on Flickr
There are a couple of comments like this. I'm not sure what the issue is, but except for using very high resolution film and top notch lenses (or recent lenses). Film is not going to come close to digital for the same format. Remember all that BS about film vs. digital when we had 4MP sensors? Well, that all went away once we got to about 12MP, so at 20MP+ the only way you are going to get something as sharp is to use medium or large format so you don't have to enlarge as much.
Having said that, I have made 16x24 inch prints from Velvia 100 (not the finest grain film) and a FD 28mm f1.8 that look just fine. Sure they don't have the resolution of a 35MP sensor with a current top lens, but they are certainty quite decent. I digitized the film by taking a photo of the slide with my macro lens, which actually works very well.
Also, to put it another way, you know how everyone worries about diffraction at f22 or even f16 now? Well no-one gave a toss when shooting film, for good reason - it didn't matter much if at all with most films and lenses. And if it did matter, those people shot medium or large format.
You can look at the full res example here - it does have some digital sharpening and editing.