(1)Get a cheap Meter
(2)attach a end to Blk and other to Wht wire - meter will read either 110v or 220 v
(3)I assume your New range is 220v so hard wire white to red and black to black or vice versa as makes no diff if branch ckt out of wall (Blk&Wht) are 220 on meter
(4)Grn to bare Wire