The Mazda 727C was a prototype racing car built by Mazdaspeed for the 24 hours of Le Mans auto race. It replaced the 717 in 1984 and was replaced by the 737 the next year. It used a 2-rotor 13B Wankel engine, similar to the production engine in the Mazda RX-7 but producing 320 hp.

Two 727s were entered at Le Mans in 1984, finishing in positions 15 and 20. A pair of Lola T616s using the same engine came tenth and twelfth that year, claiming the C2 class win.