Since you have an 85 with an automatic, your starting problem is "normal" with that year and Electronic Control Unit where the Bosch Part Number ends with 511. Green-Gold sticker on the ECU underneath the plastic cover on the right side of the passenger foot well.
Volvo had a "fix" for a couple of years at that time which involved a kit wired into the temperature sensing circuit for the ECU which is no longer available. That kit tricked the ECU into thinking it was 10 degrees colder than it actually was for about 10 minutes. If fuel pressure, idle or timing are changed to "adjust" for the poor start, those changes are detrimental to the emissions and running performance at all other operating parameters.
In later years, mid 1987 production run, they changed the ECU to "correct" the starting problem, and substituted one drivability problem for another. Starts fine but has sluggish acceleration and poor high RPM (above 3500RPM) performance. That ECU Bosch number ended with 544.
They finally got it correct with ECU's that end in 554. Last 8 months of the LH 2.2 Control units. Late production run 1988's. After that they had to go to the 2.4 or 3.1 LH systems to meet new standards.
The 554 units can be found in salvage yards in 1988 200 and 700 series non Turbo Volvos. Or any 1985 to 1988 of either series that has been serviced by a very knowledgable mechanic and an owner willing to pay the $$$ (near $900 or more) for a new ECU to correct.
I gained the above from a friendly dealership parts person shortly after I bought my 85. I then "lived" with that starting issue for two years, then the drivability of the 544 ECU for another year , until I found a 554 ECU unit in a Pick-N-Pull yard from a rear ended 740.
I was getting ready to buy a refurbished 554 unit from a Bosch authorized service facility for $365,(local Audi Independent Mechanic) when I lucked upon the 554. Volvo Dealer ships do not like to sell refurbished and if they do the price is better through an independent who has a direct relationship with Bosch.
The starting problem is most prevalent between 55 and 75 degrees starting temp. Let it idle for a few minutes before diving until the engine temp is above 75 degrees when the starting temp is in that range would be your best short (long) term solution until you luck upon a better ECU if you frequent U-Pick-It type yards or are willing to pay for another ECU whatever route the ECU becomes available.
If/when you finally do get the 554, you will need to "reset" all the engine control settings to factory spec since most likely, every mechanic under the sun has adjusted something to "correct" the problem, without success, and those wrong settings will play havoc with the 554 running your engine.
Duane