Which is stronger - a lion or a tiger?

It really depends on what attributes are being judged.  If we look at one of the most telling traits between the two - the family - the lion would be the clear winner.  They live in prides and hunt as a family unit.  They also rely on the pride to protect their young and their territory from invaders.  A tiger is a solitary animal, so it is independent and does not have the social constructs as that of a lion.