For better compareision with other skills, given udyrs base ad at lvl 1, his Q equals 110 base damage+120% bonus AD
Aatrox Q easily goes beyond that with all 3 hits, his 3ed Q alone does more damage than tiger on the sweetspot with 22+144% AD
If you use both resets, camiles Q does more than that
Cait's Q does 30+130%, though her lower base ad means slightly less damage than udyrs Q at lvl 1
Ez Q does 15+110% ad, so no much less for a spamable longrange skill
Eve's Q does a total of 130+195%AP
Graves Q does 130+140% bAD
Illaois Q does 11+132% AD on lvl 1
Kaynes Q does 120+130% bAD
Kah vs isolation deals 100+260% bAD
Lee's Q does 100-150+ 200-300% bAD based on missing health
I could go on, but i think it's pretty evident that udyrs raw Q damage is prettymuch on pair with many other champs.
Though he still has one of the best earlygames as he also gets high AS, has good base stats and can reproc the Q every 3 hits so if you just trade AAs, he usually wins against anyone.
Also, if he preps it in a brush and you facecheck, he can double proc for truely insane damage. All things considered, he probably has the high potential lvl 1 damage output in the game, but since he's melee with poor gapcloseing you can simply avoid a straight up fight. Also, his lategame teamfighting is basically non existence. Makes for a very annoying splitpusher though.