If all the current drivers tested all 2025 F1 cars at the same track for a set period of time.

[JonoNic]

I know that testing in a scenario like this is not ideal for comparisons, as the cars, drivers, and tyre degradation would not be evaluated under the same conditions. However, as an engineer, strategist, aerodynamicist, or even a fan—if all the data were made public—what would you be most interested in, and why?

The most likely scenario is that each driver would test 9 cars (in addition to their own), rather than all 19, to keep the testing window as short as possible.

[Singapore2008]

Well, I think you will never get equal conditions because of changing temperatures. You can't even take the averages.
If you are lucky, and 1 or 2 drivers will be, you'll test the cars who like cooler conditions in the morning and test the cars who like it hot in the afternoon.

But still very interesting! It is not as easy as above, and you could get some surprising results.

[stephen]

I would love to know how fast Max can drive in current McLaren car. Max is currently the best driver on the grid and McLaren is the fastest car at the moment.