This Allegro by Mozart, likely a movement from a sonata or concerto, is characterized by its effervescent energy and masterful craftsmanship. Its clear thematic development and brilliant passagework are hallmarks of Mozart's mature style.
Requires exceptional finger dexterity and rhythmic control to execute the rapid, intricate passages cleanly.
Allegro in D major is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 in D major lasts about 5.5 minutes.
Allegro in D major is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.