Led Zep: I and II, Fairport: Liege And Leif and Full House, Beatles: Sgt. Pepper's and Magical Mystery Tour are a few examples. What are yours?
Genesis - A Trick of the Tail, and Wind and Wuthering. Porcupine Tree: Stupid Dream, and Lightbulb Sun. Anathema - We're Here because We're Here, and Weather Systems.
Queen - Queen and Queen II Queen - A Night at the Opera and A Day at the Races David Bowie - Low and Heroes David Bowie - Lodger and Scary Monsters Adrian Belew - Lone Rhino and Twang Bar King King Crimson - In the Court of the Crimson King and In the Wake of Poseidon King Crimson - The ConstruKction of Light and The Power to Believe Genesis - A Trick of the Tail and Wind & Wuthering Jethro Tull - Thick as a Brick and A Passion Play Pink Floyd - Atom Heart Mother and Meddle
Funny I always think of Nursery Cryme and Foxtrot as a pair. I admit that's probably because I first heard them both as part of a two-record set - one of those with sides 1 and 4 on one disc, and sides 2 & 3 on the other, resulting in some confusion over which songs were originally on which of the albums.
The Kinks - Face To Face & Something Else Big Star - #1 Record & Radio City R.E.M. - Out Of Time & Automatic For The People
Talk Talk Spirit of Eden/Laughing Stock Talking Heads Remain In Light/Eno and Byrne My Life In The Bush of Ghosts Rutger Zuydervelt Astroneer/Astroneer 2