Hmkay, we're talking about disney animals, but how old would you estimate adult Simba? And how old do you think Zazu is? In human years? How 'bout Mufasa and Sarabi at the time Simba was born? How old do they look like to you? How about good ol' Rafiki?
That chart seems pretty accurate LT, though I'd expect Simba to be a tad bit younger since he didn't even know what "motto" meant. ^^ I found this site a few months back with a conversion thing that accurately calculates the age of your cat in human years based on how many years old it is. I think it could apply to lions as well since both have can live up to 30 years if properly taken care of. http://www.knowyourcat.info/ageconverter.htm
How 'bout Zazu? And Timon and Pumbaa? I'd estimate Zazu about 40-50 years (love his british-ness) but T&P, I don't know. They act like teenagers, but they look like adults.