XL, XLV, XLII, H340, H345, are all Prevost type designations. It all started with the Prevost LeMirage XL, a forty footer, which morphed into the XLV, a forty five footer.

When the XLII came out I do not recall seeing a designation to denote a 40 or 45 footer.

The H340 was actually 41 feet, and it also had a 45 foot version, the H345.

If you really want to go deeper Prevost makes a conversion shell (which is what we all drive), an entertainer shell and a seated coach. All you have to decide is if you like stainless or the painted look, and if you like stainless you (or your budget) has to decide if it likes rivets or smooth sides.

We won't go into variations of the windshields or powertrains.