This is a keyboard arrangement of Bach's famous orchestral concertos intended for four-hand performance. It is distinctive for its complex polyphonic textures and the challenge of balancing orchestral color within a piano medium.
Maintaining rhythmic precision and clear articulation across multiple contrapuntal voices is the primary technical hurdle.
Brandenburgische Konzerte für Pianoforte zu vier Händen is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 Brandenburgische Konzerte für Pianoforte zu vier Händen lasts about 20 minutes.
Brandenburgische Konzerte für Pianoforte zu vier Händen is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.