SELECT year FROM table_name_90 WHERE points < 1.5 AND entrant = "escuderia bandeirantes" AND engine = "maserati straight-4"
Tahun berapa ada kurang dari 1,5 poin dan peserta Bandeirantes Escuderia, dan mesin Maserati Straight-4?
CREATE TABLE table_name_90 (year VARCHAR, engine VARCHAR, points VARCHAR, entrant VARCHAR)