I do know the Rachmaninov hits the lowest note at least once (just before the B-flat major episode in the first movement), but I really don't care for the piece, so I'm not interested in looking through the score and/or sorting through a MIDI to see if it hits the 87 notes above it as well. However, it has many fans on these boards, so I'm sure someone will answer the question as to whether or not it hits all 88 keys.
Going back to the Kabalevsky Sonata No.2 (I've oft heard the Kabalevsky sonatas criticised as derivative and unoriginal - a blanket description I've seen applied to most of Kabalevsky's work, which may explain why he's not very well known next to the other Soviet composer named Dmitri - but I love all three of them, especially the slow movements of No.1 and No.3), after further perusal of the score I've noticed the first movement alone hits 87 keys - the only one missing is, as I mentioned in my last post, the highest A-flat. There are surely pieces out there which hit all 88 keys in a single movement, but I wonder how many of them do so because the composer tailored the piece to hit every key, and how many just happen to do so anyway (perhaps that's true of the Kabalevsky?).