The Mustang was developed to be a top-of-the-line model to supplement Mooney's successful Mooney M20 high-performance light aircraft. It is a five-seat pressurized single-engined aircraft with a wider and longer fuselage than the M20E Super 21 and a taller fin and leading edge fillet.Simpson 2001, p. 384–385. It is a low-winged monoplane with a retractable nosewheel undercarriage, with a similar wing to that used on Mooney's earlier M20 Ranger.
