CREATE TABLE table_45300 ("Type" TEXT, "Construction period" TEXT, "Cylinder" TEXT, "Capacity" TEXT, "Power" TEXT, "Vmax" TEXT)

What was the maximum speed for straight-4, 1.466 cc Type r 150?
SELECT "Vmax" FROM table_45300 WHERE "Cylinder" = 'straight-4' AND "Capacity" = '1.466 cc' AND "Type" = 'r 150'
SELECT "Vmax" FROM "table_45300" WHERE "Capacity" = '1.466 cc' AND "Cylinder" = 'straight-4' AND "Type" = 'r 150'