Original: The CA2010 is the same 2.4 litre V8 base of the CA2006 used by Williams, but has been re-tuned for the current 18,000 rpm limit required on all engines, down from its original 20,000 rpm implementation.
Simplified: The CA2010 is the same 2.4 litre V8 base of the CA2006 used by Williams. It has been re-tuned from 20,000 rpm to the current 18,000 rpm limit required on all engines.