Will my luggage make it on such a short transit at Heathrow T5
 

I have a 1:35 hr transfer at Heathrow terminal 5 on my way to MIA and I'm seriously considering taking a small carry-on just in case my large suitcase is delayed and stays behind till the next day.

Do you think 90 mins is enough time for my luggage to make the transfer between the planes?

MCT at T5 is 1 hour, but nothing is certain in life

In my Oct transfer at T5...took ME more than 90 min to get through passport and security control
Hope your luggage has better luck

I think that taking a carry-on with you is a great idea given the potential for delays at Heathrow.

Note that in my experience, my luggage makes to to the next plane after than I do. But no guarantees.

Your bag will make it, you might not.

Take a carry on in case you need to spend a night at LHR.

I only had one hour and 15 minutes to transfer in T5 in October (I was re-booked on the day of travel and would never have chosen this on my own.) My bag made it, but I almost did not. Bring the carry on for sure, but worry about yourself more than a checked bag.

I would take carry-on with essentials irrespective of the layover time. Even if it seemed ample, your carrier can whittle it down to nothing. I was dreading a boring 6 hour layover at ORD, but lo, there was a medical emergency on board and the plane made an emergency stop on the way. By the time we got to ORD, we had less than one hour rush rush through the terminal to make my next flight.

However, is MIA your destination or home? If it is your home, does it matter if luggage get delayed?

I'm glad to know that you guys think my luggage would most likely make it through the transfer. Apparently the real challenge seems to be racing through LHR and finding my MIA gate on time-will let you know how it goes!