I`ve included the strength scales here for both Marvel and DC for characters who can lift in excess of 25 tonnes..
From http://marvel.wikia.com/Strength_ScaleSuperhuman: 25+ tons to 50 ton rangeAdam Warlock - 40 tons (Enhanced by cosmic power)[52]
Annihilus - 50 tons[65]
Apollo - 50 tons[93]
Artemis - 30 tons[94]
Athena - 35 tons[95]
Attuma - 40 tons (If he has has been away from contact with water for an extended period)[96]
Balder - 50 tons[93]
Blastaar - 50 tons[63]
Darkoth - 50 tons[31]
Diamondhead - 45 tons[97]
Dionysus - 30 tons (His strength has decreased considerably over the centuries)[98]
Drax the Destroyer - 50 tons(In his current form)[20]
Eddie Brock (with symbiote) - 30 tons [58]
Firelord - 50 tons[60]
Frey - 30 tons[99]
Ganymede - 50 tons[3]
Grog The God-Slayer - 30 tons[100]
Guardsman (Kevin O'Brien) - 40 tons[101]
Guardsman (Michael O'Brien) - 40 tons[101]
Heimdall - 35 tons[75]
Hermes - 35 tons[102]
Hippolyta - 50 tons (Without wearing the Gauntlets of Ares)[103]
Hogun - 35 tons[54]
Human Robot - 50 tons[20]
Ikaris - 40 tons (Without telekinesis)[79]
Loki - 30 tons orginally[104] currently 50 tons [105](Though it is possible that Loki can temporarily increase his/her strength via mystical means.)[42]
Makkari - 50 tons[26]
Man-Bull - 50 tons (Later in his career and after subsequent mutations)[106]
Master Man - 50 tons (At his peak)[16]
Molten Man - 40 tons[43]
Mordecai Midas - 50 tons[26]
Nova - 40 tons[78]
Photon - 30 tons[49]
Roughouse - 50 tons[49]
Sabra - 50 tons[34]
S.H.I.V.A. - 40 tons[107]
Sif - 30 tons[91]
Tiger Shark - 50 tons (After being dry for several hours)[106]
Tyr - 35 tons (However, his ability to lift and move great weights was affected due to the loss of his left hand)[101]
U-Man - 40 tons (While dry)[63]
U-Man - 50 tons (While immersed in water or is at least wet)[63]
Valkyrie - 45 tons[108]
Vision - 50 tons (While at maximum density, current "Kid Vision" form)[74]
Volstagg - 35 tons (Though his strength has diminished from the 50 ton level due to advanced age and poor physical conditioning)[109]
Woodgod - 50 tons[32]
Wrecker - 40 tons (While possessing all of his powers)[75]
Zuras - 30 tons (Without telekinesis)[30]
Superhuman: 50+ tons to 75 ton rangeAres - 70 tons[19]
Arkon - 75 tons[13]
Attuma - 60 tons (While immersed in water or is even slightly wet)[110]
Black Bolt - 60 tons (Augmented with electron energy)[32]
Carnage - 50 tons (This is not his true limit as his strength increases with his size and variable muscle mass)[33]
Dionysus - 70 tons (While he was in his physical prime)[111]
Doc Samson - 70 tons[20]
Executioner - 65 tons[63]
Rhino - 60 tons[49]
Her - 70 tons[112]
Horus - 75 tons[113]
Hulk: Gray Hulk - 70 tons (While in a functionally "calm" emotional state)[67]
Ironclad - 60 tons[33]
Lunatik - 75 tons (Prior to undergoing a severe decrease in his powers, he was ultimately able to lift well over 100 tons.)[42]
Magdalene - 75 tons[26]
Anti-Venom - 70 tons (This is not his true limit as his strength increases with his size and variable muscle mass) [114]
Mac Gargan - 70 tons (After bonding with the Venom symbiote, this is not his true limit as his strength increases with his size and variable muscle mass) [74]
Man-Killer - 75 tons[26]
Midnight Sun - 75 tons[26]
Ms. Marvel - 70 tons[26]
Ms. Marvel II - 75 tons (While in her "She-Thing" form)[47]
Namora - 75 tons (While wet or immersed in water)[28]
Nebula - 60 tons[28]
Neptune - 70 tons (Without supplementing his strength with cosmic powers)[115]
Odin - 75 tons[28]
Orka - 75 tons (While dry)[17]
Overmind - 70 tons (While using his psionic powers to supplement his strength)[116]
Pluto - 75 tons[49]
Redstone - 75 tons[45]
Rockslide - 75 tons[106]
Ronan the Accuser - 60 tons (While wearing his armor)[49]
Seth - 75 tons (Before the loss of his right hand)[117]
Terrax the Tamer - 75 tons (Without supplementing his strength with the Power Cosmic)[109]
Thundra - 60 tons[11]
Tiger Shark - 75 tons (While immersed in water or wet)[106]
Toxin - 65 tons (This is not his true limit as his strength increases with his size and variable muscle mass)[118]
Superhuman: 75+ tons to 90 ton rangeCaptain Britain - 90 tons (While wearing his costume)[119]
Deathlok - 85 tons (With the potential to be able to lift 150 tons if he were to overcome computer safegards that prevent him from achieving this limit.)[120]
Griffin - 90 tons (With the potential for greater strength due to further mutations)[121]
Hyperion (Squadron Sinister) (Earth-616) - 90 tons[20]
Lionheart - 90 tons[42]
Quicksand - 80 tons[67]
Sasquatch- 90 tons[122] (Current Sasquatch form)
Sphinx - 85 tons[65]
Toxin - 80 tons (This is not his true limit as his strength increases with his size and variable muscle mass)[123]
Hulk: Savage Hulk - 90 tons (While in a functionally "calm" emotional state)[67]
Malekith the Accursed - 90 tons (While supplementing his strength with his mystical powers)[63]
Osiris - 80 tons[124]
Quicksand - 80 tons[67]
Sandman - 85 tons[101]
Sub-Mariner - 85 tons (When active on the surface)[16]
Zuras - 90 tons (While supplementing his strength using his telekinetic powers)[30]
Zeus - 90 tons (Without supplementing his strength with cosmic powers)[125]
Superhuman: 90+ tons to 100 ton rangeBloodaxe - 100 tons[126]
The Captain - 95 tons[20]
Danger - 100 tons[20]
Earth Lord - 100 tons[80]
Ultron - 100 tons[51]
Hulk: Merged Hulk - 100 tons (While in a functionally "calm" emotional state)[67]
Hyperion - 100 tons[127]
Iron Man - 100 tons (While wearing the Iron Man armor)[20]
Kronans - 100 tons (Strength level of the average adult Kronan)[32]
Leir - 100 tons[64]
Orka - 95 tons (While wet and without supplementing his strength by drawing upon the energies of killer whales within his vicinity)[17]
Siege - 100 tons [128]
Sub-Mariner - 100 tons (While in contact with water)[16]
Titania (Mary MacPherran) - 100 tons[71]
Ulik - 95 tons[78]
Superhuman: Potentially incalculable, able to lift in excess of 100 tonsA-Bomb - 100 tons[42]
Abomination[129]200 tons
Abraxas[1]
Adversary
Ajax[130]
Akhenaten[1]
Ares - (When wearing the gauntlets of Ares) [19]
Atlas (Erik Josten)[1]
Apocalypse[63]
Beta Ray Bill[131]
Beyonder[126]
Blackheart[132]
Blue Marvel
Captain Axis[32]
Colossus [133]
Count Nefaria[51]
Dragon Man[16]
Ego[3]
Galactus[134]
Gilgamesh[22]
Gladiator (While his confidence is at its peak)[67]
Hela (Provided she wears her cloak)[64]
Hercules[34]
Hulk (All Incarnations while in an enraged emotional state)[67][32]
Hulk 2099 (He has a base strength level of 150 tons and his strength increases as he becomes angrier)[17]
Iron Man -(While wearing the Hulkbuster Iron Man armor)[135]
Juggernaut[136]
Kurse[65]
Living Tribunal[69]
Maestro - 200 tons (While in a functionally "calm" emotional state and his strength dramatically increases as he becomes angrier)[26]
Magneto (While using his magnetic powers to increase his strength)[78]
Mahkizmo[26]
Mangog[101]
Maxam (At his maximum size)[26]
Mephisto (While in his own realm. His strength decreases steadily the longer he is away from it)[132]
Morg The Executioner (While supplementing his strength with the Power Cosmic)[137]
Nova (While supplementing his strength with the full might of the Nova Force)[89]
Orka (While drawing upon the energies of killer whales within his vicinity)[17]
Ultron (After he became Phalanx Ultron)[51]
Red Hulk[138]
Red Ronin[78]
Red She-Hulk
Reptyl Prime[69]
Sentry[139]
She-Hulk[32]
Silver Surfer (While supplementing his strength with the Power Cosmic)[70]
Skaar (While in an enraged emotional state)[140]
Stardust (While supplementing his strength with the Power Cosmic)
Stranger[71]
Surtur[11]
Thanos[71]
Thing[141]
Thor[65]
Tryco Slatterus[3]
Wonder Man[19]
Ymir[2]
(Note: The upper limit of the physical strength of these characters is unknown.)
Undefined: Possessing some degree of superhuman strength, though the current and exact extent of physical strength is not as clearly definedCaiera Oldstrong - More than 75 tons but no more than 100 tons[32]
Epoch - More than 800 lbs but no more than 25 tons[3]
Eric The Red - More than 800 lbs but no more than 25 tons[3]
Frankenstein's Monster - More than 2 tons but no more than 10 tons[101]
Gargoyle - More than 800 lbs but no more than 25 tons[3]
Grandmaster - More than 800 lbs but no more than 25 tons[112]
Huntsman - More than 75 tons but no more than 100 tons[20]
Jack of Hearts - At least 25 tons (There is a possibility that the upper limit of his strength could be higher as his overall power level often fluccuates.)[20]
J2 - More than 75 tons but no more than 100 tons[112]
Killer Shrike - More than 800 lbs but no more than 25 tons[120]
Mephista - More than 25 tons but no more than 75 tons[26]
Rage - More than 75 tons but no more than 100 tons (While not using his strength for violence)[51]
Sabreclaw - More than 800 lbs but no more than 25 tons[142]
Sabretooth - More than 800 lbs but no more than 25 tons[143]
Super Skrull - More than 75 tons but no more than 100 tons[71]
Warpath - More than 800 lbs but no more than 25 tons[74]
Wild Thing - More than 800 lbs but no more than 25 tons[74]
Wolverine - More than 800 lbs but no more than 2 tons[143] (He has demonstrated sufficient physical strength to snap steel chains[144][145] and to lift the weight of a dozen men over his head, with one arm, and hurl them through a wooden wall.[146]
And this is from http://dc.wikia.com/wiki/Strength_ScaleSuperhuman: 25+ tons to 50 ton rangeCyborg (Victor Stone) (easliy able to lift many tons) [13]
Starfire (Koriand'r) (able to lift many tons)
Superhuman: 50+ tons to 75 ton rangeAquaman (about 60 tons on land )[14]
Hippolyta
Vixen (about 55 tons while using the Tantu Totem)[15]
Superhuman: 75+ tons to 90 ton rangeKilowog
Red Tornado
Superhuman: 90+ tons to 100 ton rangeArtemis of Bana-Mighdall (New Earth) (with Gauntlet of Atlas)
Atom-Smasher - (Variable) [16]
Cassandra Sandsmark (New Earth)
Superhuman: Class 100+ ;Potentially incalculable (able to lift far in excess of 100 tons)Achilles Warkiller (New Earth)
Apollo (Earth-50)
Aquaman (Can lift well over 100 tons while underwater)
Ares
Black Adam
Big Barda [17]
Bizarro
Bizarro I
Bizarro II
Bizarro III
Brainiac
Captain Atom
Captain Marvel
Caitlin Fairchild (Earth-50)
Christopher Kent (Earth-16)
Clark Kent (Smallville)
Cyborg (Hank Henshaw)
Darkseid
Despero
Diana of Themyscira (New Earth)
Diana of Themyscira (DCAU)
Donna Troy
Doomsday
Draaga (New Earth)
Eradicator (New Earth)
Etrigan
Frederick Freeman (Earth-S)
Frederick Freeman (New Earth)
Geo-Force
Giganta
Gog
Grayven
He-Man
Herakles (New Earth)
Icon[18]
Isis (Adrianna Tomaz)
Imperiex-Prime (New Earth)
Kalibak
Lar Gand
Linda Danvers (New Earth)
Lobo
Majestic
Majestros (Earth-50)
Major Force
Martian Manhunter [19]
Mary Batson (Earth-S)
Mary Batson (New Earth)
Matrix (Pocket Universe)
Maxima
Mister Miracle (with the Anti-Life Equation)
Mongul I
Mongul II
Nathaniel Adam (New Earth)
Orion
Osiris (Amon Tomaz)
Plastic Man (when in skyscraper form)
Power Boy (New Earth)
Power Girl
Sodam Yat
Solomon Grundy
Superboy (Earth-One)
Superboy (Kon-El)
Superboy (Pocket Universe)
Superboy-Prime
Supergirl (Earth-One)
Supergirl (New Earth)
Superman (Earth-2)
Superman (Earth-15)
Superman (Earth-22)
Superman (Earth-30)
Superman (Earth-31)
Superman (Earth-One)
Superman (Earth-Two)
Superman (New Earth)
Superman (Post-Crisis)
Ultraman (Earth-3)
Ultraman (Earth-Three)
Ultraman (Qward)
William Batson (Earth-S)
William Batson (New Earth)
William Matthews (New Earth)
Cassandra Sandsmark (New Earth)
Wonder Woman (Earth-10)
Wonder Woman (Earth-15)
Wonder Woman (Earth-30)
Wonder Woman (Earth-34)
Zauriel
Zeus (New Earth)
All lanterns when using their rings.
(Note: Many characters' upper power and strength limits have varied greatly over the course of their written histories. Those in the 100+ range, can generally lift as much as 100,000 tons; such as Superman, Captain Marvel, and Darkseid.)