SELECT tyre FROM table_name_51 WHERE rounds = "14-15" AND engine = "ford cosworth dfv 3.0 v8" AND chassis = "m23"
Ketika mesin Ford Cosworth DFV 3.0 V8 memiliki sasis M23 dan dalam putaran 14-15, apa bannya?
CREATE TABLE table_name_51 (tyre VARCHAR, chassis VARCHAR, rounds VARCHAR, engine VARCHAR)