Voldemort vs Dumbledore without the Elder Wand is, I think, more difficult to answer than most realize.
Originally posted by Peach
Dumbledore having the Elder Wand was pretty much irrelevant; after all, he won the duel to get the Elder Wand without killing the previous owner. Grindelwald was probably as powerful as Voldemort was, minus the Horcrux thing.
First, how is having the Elder Wand irrelevant? Sure it's not unbeatable but it is the most powerful wand in existence. Able to redirect killing curses and repair Harry's Wand.
Secondly, no way was Grindelwald Voldemort's equal. Grindelwald was defeated by a younger less expirenced Dumbledore in a duel despite having the Elder Wand; on the other hand, Voldemort was able to stalemate Dumbledore. Furthermore, Voldemort has been called the "Most Dangerous Dark Wizards of All Time".
Originally posted by Peach
When they fought in OotP, Voldemort was indeed more aggressive. But Dumbledore was able to easily avoid/deflect/turn aside each of Voldemort's attacks.
Not easily surely. Afterall, Fawkes took a killing curse for Dumbledore while he was fighting the fire serpent. Heck, Dumbledore was even afraid when Voldemort disappeared.
Ultimately, Voldemort is certianly one of the mightiest wizards in the novels. Dumbledore says this about Voldy in OotP, "I knew that Voldemort's knowledge of magic is perhaps more extensive than any wizard alive. I knew that even my most complex and powerful protective spells and charms were unlikely to be invincible if he ever returned to full power."
He was also able to duel 3 proficent duelist at once in a duel (Slughorn, McGonagall, Kingsley) despite his magic not working to the best of it's abillty due to Harry's sacrafice yet he was still winning. And of coruse he was able to do some rather unique things with magic such as his curse on the Defense Against the Dark Arts post and his abilty to fly (which goes against Magical Law). In a fight against a Dumbledore without the Elder Wand I see it going either way.