Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_85 (points INTEGER, year VARCHAR, engine VARCHAR, chassis VARCHAR)

### Question ###
Which engine of bmw had the lowest points and chassis of march 792 that is newer than 1979?

### Accurate SQL ###

SELECT MIN(points) FROM table_name_85 WHERE engine = "bmw" AND chassis = "march 792" AND year > 1979