Analog didn't have an "XxY" resolution. VHS was about 3MHz of luma resolution and 400Khz of chroma, which was 240 lines - but that was interlaced, so your actual vertical resolution was 480 lines per interlaced frame (30 per second at US rates) -- but your Y (luma) signal would change far more often than your Pb and Pr signals (which gave the color by recording how far off the Y signal Blue and Red were)
NTSC has a nominal resolution of 720x480i (240 lines per field, 60 fields per second). VHS on its best days could get about half the horizontal resolution for luma, and even less for color, but often ended up a bit worse, so 320x480i is probably a good approximation for the resolution (ignoring the fact that color is even lower resolution).
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On a slightly different note, the HiFi audio track (supported for playback by pretty much all VCRs by the late 80s; not sure if/when HiFi recording became normal) of VHS was undoubtably the highest quality consumer analog audio product to get wide usage, with an SNR and dynamic range slightly better than the very best cassette decks.
Maybe, but as I remember it, VHS looked much better than analog TV from the same time. I remember being marveled by how clear it looked in comparison (mostly because it did not have as much noise as analog TV did even with a good antenna).