I wish you luck
I've often wondered the same thing and decided that there is no inexpensive way to accurately test this.
Rider position is about 80% of aero drag, so keeping you body exactly the same for all of those rides is going to be tough.
It will take some time to complete the entire battery of tests and counting on the wind and weather as well as traffic to be the same is a concern.
Will you start your course at speed? How fast you accelerate will have a bearing on calorie burn.
My thought was that you would need a watt meter, heart rate monitor, and perhaps a velodrome to get a fairly accurate test--then you still need to deal with body position.
Please don't think I'm trying to dis courage you (I'd love to know the answer) just mentioning things to be aware of.
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