This is a list of champions and their armor at level 1, armor growth and armor at level 18. This does not contain any armor gained from abilities (passive or active), items, runes or masteries.

Under the list you can see one additional champion: Mega Gnar, the alternate form of Gnar who has different base stats.
Champion Value at level 1 Growth coefficient Value at 18
Aatrox Aatrox24.384+3.889
Ahri Ahri20.88+3.580.4
Akali Akali26.38+3.585.9
Alistar Alistar24.38+3.583.9
Amumu Amumu23.544+3.888.1
Anivia Anivia21.22+489.2
Annie Annie19.22+487.2
Ashe Ashe21.212+3.479
Aurelion Sol Aurelion Sol19+3.680.2
Azir Azir19.04+370
Bard Bard25+493
Blitzcrank Blitzcrank24.38+492.4
Brand Brand21.88+3.581.4
Braum Braum26.72+4.5103.2
Caitlyn Caitlyn22.88+3.582.4
Camille Camille26+3.890.6
Cassiopeia Cassiopeia25+3.584.5
Cho'Gath Cho'Gath28.88+3.588.4
Corki Corki23.38+3.582.9
Darius Darius30+498
Diana Diana26.048+3.687.2
Dr. Mundo Dr. Mundo26.88+3.586.4
Draven Draven25.544+3.381.6
Ekko Ekko27+378
Elise Elise22.128+3.3579.1
Evelynn Evelynn28+3.587.5
Ezreal Ezreal21.88+3.581.4
Fiddlesticks Fiddlesticks20.88+3.580.4
Fiora Fiora24+3.583.5
Fizz Fizz22.412+3.480.2
Galio Galio24+3.583.5
Gangplank Gangplank26+377
Garen Garen27.536+378.5
Gnar Gnar23+2.565.5
Gragas Gragas26.05+3.687.3
Graves Graves24.376+3.482.2
Hecarim Hecarim26.72+494.7
Heimerdinger Heimerdinger19.04+370
Illaoi Illaoi26+3.890.6
Irelia Irelia25.3+3.7589.1
Ivern Ivern22+3.581.5
Janna Janna19.384+3.884
Jarvan IV Jarvan IV29+3.690.2
Jax Jax27.04+3.078
Jayce Jayce22.38+3.581.9
Jhin Jhin20+3.579.5
Jinx Jinx22.88+3.582.4
Kalista Kalista19.012+3.578.5
Karma Karma20.384+3.885
Karthus Karthus20.88+3.580.4
Kassadin Kassadin23.376+3.277.8
Katarina Katarina27.88+3.587.4
Kayle Kayle26.88+3.586.4
Kayn Kayn29+3.385.1
Kennen Kennen24.3+3.7588.1
Kha'Zix Kha'Zix27+378
Kindred Kindred20+3.579.5
Kled Kled26+494
Kog'Maw Kog'Maw19.88+3.579.4
LeBlanc LeBlanc21.88+3.581.4
Lee Sin Lee Sin24.216+3.787.1
Leona Leona27.208+3.688.4
Lissandra Lissandra20.216+3.783.1
Lucian Lucian24.04+375
Lulu Lulu19.216+3.782.1
Lux Lux18.72+486.7
Malphite Malphite28.3+3.7592.1
Malzahar Malzahar18+3.577.5
Maokai Maokai30+498
Master Yi Master Yi24.04+375
Miss Fortune Miss Fortune24.04+375
Mordekaiser Mordekaiser20+3.7583.8
Morgana Morgana25.384+3.890
Nami Nami19.72+487.7
Nasus Nasus24.88+3.584.4
Nautilus Nautilus26.46+3.7590.2
Nidalee Nidalee22.88+3.582.4
Nocturne Nocturne26.88+3.586.4
Nunu Nunu23+3.582.5
Olaf Olaf26.04+377
Orianna Orianna17.04+368
Ornn Ornn24.04+375
Pantheon Pantheon27.652+3.994
Poppy Poppy29+3.588.5
Quinn Quinn23.38+3.582.9
Rakan Rakan24+3.990.3
Rammus Rammus31.384+4.3104.5
Rek'Sai Rek'Sai24+3.7587.8
Renekton Renekton25.584+3.890.2
Rengar Rengar25+376
Riven Riven24.376+3.278.8
Rumble Rumble25.88+3.585.4
Ryze Ryze21.552+372.6
Sejuani Sejuani27+495
Shaco Shaco24.88+3.584.4
Shen Shen25+376
Shyvana Shyvana29+3.3586
Singed Singed27.88+3.587.4
Sion Sion23.04+374
Sivir Sivir22.21+3.2577.5
Skarner Skarner29.384+3.894
Sona Sona20.544+3.376.6
Soraka Soraka23.384+3.888
Swain Swain22.72+490.7
Syndra Syndra24.712+3.482.5
Tahm Kench Tahm Kench27+3.586.5
Taliyah Taliyah20+371
Talon Talon26.88+3.586.4
Taric Taric25+3.482.8
Teemo Teemo24.3+3.7588.1
Thresh Thresh16+016
Tristana Tristana22.0+373
Trundle Trundle27.536+2.773.4
Tryndamere Tryndamere24.108+3.176.8
Twisted Fate Twisted Fate20.542+3.1574.1
Twitch Twitch23.04+374
Udyr Udyr25.47+493.5
Urgot Urgot30+4.25102.3
Varus Varus23.212+3.481
Vayne Vayne19.012+3.476.8
Veigar Veigar22.55+3.7586.3
Vel'Koz Vel'Koz21.88+3.581.4
Vi Vi25.88+3.585.4
Viktor Viktor22.72+490.7
Vladimir Vladimir23+3.379.1
Volibear Volibear26.38+3.585.9
Warwick Warwick24.04+3.278.4
Wukong Wukong24.88+3.584.4
Xayah Xayah24+375
Xerath Xerath21.88+3.581.4
Xin Zhao Xin Zhao25.88+3.585.4
Yasuo Yasuo24.712+3.482.5
Yorick Yorick30+498
Zac Zac24+3.583.5
Zed Zed26.88+3.586.4
Ziggs Ziggs21.544+3.377.6
Zilean Zilean19.134+3.883.7
Zyra Zyra20.04+371

Mega Gnar

Champion Value Level 1 Growth (per level coefficient) Value at 18
Mega Gnar Mega Gnar 26.5 +4.5 103

See also