It always seems like the more I learn the less I know.
First, comparison of ships. All have the same three upgrades in the most effective configuration. First thing learned, the most effective configuration is different in the Interceptor.
Explorer Class A, 1455
Same Explorer, upgraded to S, 1598
Exotic, 1567
Interceptor, 1532-drive supercharged
Interceptor, 1435-module supercharged
So, first conclusion: @Polyphemus is correct, the S class Explorer with the same modules in optimal configuration has the greatest range. The surprise is that optimal configuration as we discussed it was ‘drive on supercharge’ and that turns out not true in most cases. Well, in cases where you have a strong module. For the Explorer and the Exotic the ‘bare drive’ has a range of something just short of 200, and that module is 220. Optimal arrangement turns out to be supercharging the best number, so if the best module is stronger than the bare drive, supercharge the module.
Which brings us to what surprised me. Upgrade performance is severely nerfed in the interceptor.
Interceptor with base drive only, supercharged, 821
The three modules only add 614 to the Interceptor. My hypothesis is that there is no ‘adjacency bonus’ with the Crimson Core. I have some additional tests to run.
For now, my conclusion is that the Explorer is the best long range jumper, as it is supposed to be. In my case this is compounded by the fact that I have higher priorities for the supercharged slots in my Exotic, so its jump range would not normally be optimized. This does resolve my issue from the other day, which was ‘is it worth adding an S class Explorer to my collection?’ It is apparently the optimal craft for long range trekking via hyperdrive, so yes.