America’s oldest surviving au tomobile, the century-old Roper Steam Carriage, will be the sen ior citizen of the Greenfield Vil lage Old Car Festival, set for Saturday and Sunday, Septem ber 14-15. More than 300 antique auto mobiles, none later than 1925, will compete for fun and prizes in such contests as cranking, slow driving, backward driving and obstacle races at the two day Festival. Old car fans from coast to coast meet at Green field Village each year to recap ture the authenticity and nos talgia of motoring’s early days for spectators and participants alike. Last year, Festival at tendance topped the 30,000 mark famous collection of 200 signifi cant antique automobiles. Both the Museum and Village, lo cated in Dearborn, Mich., 15 miles from downtown Detroit, are open all year. They host a continuing program of annual special events, of which the Old Car Festival is an unchallenged favorite. A special event of the 1963 Old Car Festival, held during the Henry Ford Centennial, will be a contest between the Grand Champions chosen from each competing class (1899-1916 and 1917-1925) in the twelve previous Festivals. The Roper Steam Carriage, also celebrating its Centennial this year, is highlighted in the Henry Ford Museum's world-