i believe most tigers are stronger than lions.if force=mass*acceleration, a tiger has a bigger force due to its mass.one other factor that helps the tiger to be stronger is its experince. a lion never gets to hunt,or fight very often, because they live togther therefore their experince of fight is devided.lion usually doenst do much at all, a part from when they need to fight other lions if they cross each other tritory, which may not even happen, or fighting heynas protecting the female once in a while, but a tiger hunts fights and protect his tritory all on his own.therefore are more experienced than lions. tigers are faster feline than lions, lactic acid is burned slower in their bodiy that allows them fight for longer, strong legs allows tiger to out maneuver the lion.