'16 Batmobile - Plank
'89 Batmobile - Dominus
007's Aston Martin DB5 - Octane
007's Aston Martin DBS - Dominus
007's Aston Martin Valhalla - Dominus
Ace - Breakout
Admiral - Dominus
Aftershock - Dominus
Animus GP - Breakout
Artemis - Plank
Artemis G1 - Plank
Artemis GXT - Plank
Backfire - Octane
Batmobile (2022) - Dominus
Battle Bus - Merc
Behemoth - Merc
Beskar - Hybrid
BMW 1 Series - Octane
BMW M240i - Dominus
Bone Shaker - Octane
Breakout - Breakout
Breakout Type-S - Breakout
Bugatti Centodieci - Plank
Bumblebee - Dominus
Centio v17 - Plank
Chikara - Dominus
Cyclone - Breakout
Delorean Time Machine - Dominus
Diesel - Breakout
Diestro - Dominus
Dingo - Octane
Dominus - Dominus
Dominus GT - Dominus
Emperor - Breakout
Emperor 2 (Frozen & Scorched) - Breakout
Endo - Hybrid/Unique
Esper - Hybrid/Unique
Fast & Furious Dodge Charger - Dominus
Fast & Furious Dodge Charger SRT Hellcat - Dominus
Fast & Furious Nissan Skyline - Hybrid/Unique
Fast & Furious Pontiac Fiero - Hybrid/Unique
Fast 4WD - Octane
Fennec - Octane
Ferrari 296 GTB - Dominus
Ford Bronco Raptor RLE - Merc
Ford F-150 RLE - Octane
Ford Mustang Mach-E RLE - Octane
Ford Mustang Shelby GT350R RLE - Dominus
Formula 1Ⓡ 2021 - Dominus
Fuse - Breakout
Gazella GT - Dominus
Ghostbusters Ecto-1 - Dominus
Gizmo - Octane
Grog - Octane
Guardian - Dominus
Harbinger - Octane
Harbinger GXT - Octane
Honda Civic Type R - Octane
Hotshot - Dominus
Ice Charger - Dominus
Imperator - Dominus
Insidio - Hybrid
Jackal - Octane
Jäger 619 RS - Hybrid/Unique
Jeep Jurassic Wrangler - Octane
Komodo - Breakout
K.I.T.T. - Dominus
Lamborghini Countach LPI 800-4 - Dominus
Lamborghini Huracán STO - Dominus
Lightning McQueen - Dominus
Lockjaw - Dominus
Maestro - Dominus
Mako - Breakout
Mamba - Dominus
Mantis - Plank
Marauder - Octane
Masamune - Dominus
Maverick - Dominus
Maverick G1 - Dominus
Maverick GTX - Dominus
Mazda-RX7 - Breakout
McLaren 570S - Dominus
McLaren 765LT - Dominus
McLaren Senna - Breakout
Merc - Merc
MR11 - Dominus
Mudcat - Octane
Mudcat GT - Octane
Mudcat GXT - Octane
NASCAR: Chevrolet Camaro - Dominus
NASCAR: Ford Mustang - Dominus
NASCAR: Toyota Camry - Dominus
NASCAR Next Gen Chevrolet Camaro (2022) - Dominus
NASCAR Next Gen Ford Mustang (2022) - Dominus
NASCAR Next Gen Toyota Camry (2022) - Dominus
Nemesis - Dominus
Nexus - Breakout
Nexus SC - Breakout
Nimbus - Hybrid/Unique
Nissan Fairlady Z - Dominus
Nissan Fairlady Z RLE - Dominus
Nissan Silvia - Hybrid
Nissan Silvia RLE - Hybrid
Nissan Z Performance Car - Dominus
Nomad - Merc
Nomad GXT - Merc
Octane - Octane
Octane ZSR - Octane
Outlaw - Octane
Outlaw GXT - Octane
Paladin - Plank
Peregrine TT - Dominus
Porsche 911 Turbo - Dominus
Porsche 911 Turbo RLE - Dominus
Primo - Hybrid
Proteus - Octane
R3MX - Hybrid
R3MX GXT - Hybrid
Redline - Breakout
Ripper - Dominus
Road Hog - Octane
Road Hog XL - Octane
Ronin - Dominus
Ronin GT - Dominus
Ronin GXT - Dominus
Samurai - Breakout
Scarab - Octane
Scopion - Dominus
Sentinel - Plank
Shokunin - Octane
Shokunin GXT - Octane
Snoop's Cadillac Deville - Breakout
Takumi - Octane
Takumi RX-T - Octane
Tesla Cybertruck - Hybrid
The Dark Knight Rises Tumbler - Octane
Triton - Octane
Twin Mill III - Plank
Twinzer - Octane
Tygris - Hybrid/Unique
Tyranno - Dominus
Tyranno GXT - Dominus
Venom - Hybrid/Unique
Void Burn - Hybrid
Volkswagon Golf GTI - Octane
Volkswagon Golf GTI RLE - Octane
Vulcan - Octane
Werewolf - Dominus
Whiplash - Breakout
X-Devil - Hybrid/Unique
X-Devil MK2 - Hybrid/Unique
Zippy - Octane

Octane type:
007's Aston Martin DB5, Backfire, BMW 1 Series, Bone Shaker, Dingo, Fast 4WD, Fennec, Ford F-150 RLE, Ford Mustang Mach-E RLE, Gizmo, Grog, Harbinger, Harbinger GXT, Honda Civic Type R, Jackal, Jeep Jurassic Wrangler, Marauder, Mudcat, Mudcat G1, Mudcat GXT, Octane, Octane ZSR, Outlaw, Outlaw GXT, Proteus, Road Hog, Road Hog XL, Scarab, Shokunin, Shokunin GXT, Takumi, Takumi RX-T, Triton, The Dark Knight Rises Tumbler, Twinzer, Volkswagon Golf GTI, Volkswagon Golf GTI RLE, Vulcan, Zippy.

Dominus type:
'89 Batmobile, 007's Aston Martin DBS, 007's Aston Martin Valhalla, Admiral, Aftershock, Batmobile (2022), BMW M240i, Bumblebee, Chikara, Delorean Time Machine, Diestro, Dominus, Dominus GT, Ecto-1, Fast & Furious Dodge Charger, Fast & Furious Dodge Charger SRT Hellcat, Ferrari 296 GTB, Ford Mustang Shelby GT350R RLE, Formula 1Ⓡ 2021, Gazella GT, Guardian, Guardian G1, Guardian GXT, Hotshot, Ice Charger, Imperator DT5, K.I.T.T., Lamborghini Countach LPI 800-4, Lamborghini Huracán STO, Lightning McQueen, Lockjaw, Maestro, Mamba, Masamune, Maverick, Maverick G1, Maverick GXT, McLaren 570S, McLaren 765LT, MR11, NASCAR: Chevrolet Camaro, NASCAR: Ford Mustang, NASCAR: Toyota Camry, NASCAR Next Gen Chevrolet Camaro (2022), NASCAR Next Gen Ford Mustang (2022), NASCAR Next Gen Toyota Camry (2022), Nemesis,Nissan Fairlady Z, Nissan Fairlady Z RLE, Nissan Z Performance Car, Peregrine TT, Porsche 911 Turbo, Porsche 911 Turbo RLE, Ripper, Ronin, Ronin GT, Ronin GXT, Scorpion, Tyranno, Tyranno GXT, Werewolf.

Merc type:
Battle Bus, Behemoth, Ford Bronco Raptor RLE, Merc, Nomad, Nomad GXT

Plank type:
'16 Batmobile, Artemis, Artemis G1, Artemis GXT, Bugatti Centodieci, Centio v17, Mantis, Paladin, Sentinel, Twin Mill III.

Breakout type:
Ace, Animus GP, Breakout, Breakout Type S, Cyclone, Diesel, Emperor, Emperor 2 (Frozen & Scorched), Fuse, Komodo, Mako, Mazda-RX7, McLaren Senna, Nexus, Nexus SC, Redline, Samurai, Snoop's Cadillac Deville, Whiplash.

Unique/Hybrid*:
Beskar, Endo, Esper, Fast & Furious Nissan Skyline, Fast & Furious Pontiac Fiero, Insidio, Jäger 619 RS, Nimbus, Nissan Silvia, Nissan Silvia RLE, Primo, R3MX, R3MX GXT, Tesla Cybertruck, Tygris, Venom, Void Burn, X-Devil, X-Devil MK2.

*Cars with Hybrid/Unique has it own hitbox and sits between tall and long. Source (Rocket League's Twitter).

Source for the info: Rocket League Support[support.rocketleague.com], Rocket League's Twitter, Rocket Science's Spreadsheet[onedrive.live.com].

If there is any divergence from the actual hitbox please inform me in the comments.
If there is any missing cars also inform me in the comments.

Thumbnail credit: felixdicit Link[imgur.com]