A brilliant and technically demanding work by Liszt, often overlooked compared to his larger sets, yet quintessentially representative of his bravura style. It requires significant physical endurance and keyboard facility.
The work demands extreme keyboard coverage and the ability to project large, resonant chords through the texture.
Comparable difficulty and character — good candidates for what to learn next.
Allegro di bravura (S.151) is rated Henle level 8 of 9 — concert repertoire, roughly diploma level. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 8 — meaning you can already play level 7–8 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Allegro di bravura (S.151) lasts about 10 minutes.
Allegro di bravura (S.151) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Rhapsodie espagnole by Franz Liszt, Ballade No.2 by Franz Liszt, Cadenza to the first movement of Beethoven's Concerto No.3 by Franz Liszt — see the full similar-pieces list on this page.