Inaccurate performance data for BOB fighters in COD comparing to RL data

[Moggy]

You have to remember that the only RAF aircraft (as far as I'm aware) which would be using 100 octane fuel are the Spitfire, Hurricane and Defiant. I'm pretty sure (given stock levels during the battle) that the fuel was used universally amongst the groups. As we all know, squadrons changed groups as and when needed so the need for the fuel would of still been there, although I'd imagine an aircraft using 100 octane fuel would still be able to use 87 octane if needed...without the performance boost of course.

*EDIT*
Apologies if this has already been posted but Swallow has found an interesting piece of information in the Spitfire I pilot notes, Section 2; Handling and flying notes for the pilot, supplied with the Collector's Edition;

Fuel: - Operational units: 100 octane only. Other units: 87 octane