KAWAI
Grand pianos are horizontal with a repetition lever action. Uprights are vertical and more compact. Grands produce richer tone and allow faster repeated notes.
Visually, grand pianos are positioned horizontally and stand on three legs; they are longer than they are tall. Upright pianos have a vertical orientation and are taller than they are deep.
Physically, grand pianos are much heavier — ranging from around 600 lbs for a baby grand to over 1,100 lbs for a 9-foot concert grand. Upright pianos typically range from around 400 to 600 lbs.
From a sound perspective, grand pianos can project more volume, especially with the lid fully open. The horizontal design allows the full acoustic potential of the internal components — larger soundboard, longer strings, and bigger iron plate — resulting in deeper, richer tone.
Mechanically, grand pianos have a repetition lever (jack) that allows a note to be replayed without fully releasing the key. This is essential for rapid repeated notes in advanced repertoire. Upright pianos do not have a repetition lever — each note must be fully released before being replayed.
