I make that just shy of 235 years total, using wiki's album lengths of 41'02 and 41'16 respectively. That's excluding bog breaks and assuming you restart the instant the previous play has finished.
Exodus definitely.
Screamdelica... I think Xtrmntr is better (controversial)
London Calling. Over-rated in my opinion (controversial). The Clash - The Clash is much better (not controversial, simply a fact).
Has anyone mentioned Van Morrison's Astral Weeks yet?
If not, consider it mentioned. Songs that just ramble on amiably don't come any better than Madame George.
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MBV - Loveless
Ride - Nowhere
The Au Pairs - Playing With a Different Sex
The Only Ones - Even Serpents Shine (I know several people will argue that The Only Ones is better, but for me, this is the more complete album)
Echo & the Bunnymen - hmmm, actually I can't call it between Crocodiles...
Interesting to see so many votes for 17 Seconds. For me it was their 'disappointing second album' after the joys of Three Imaginary Boys. Though not as diasappointing as Faith, the 'disappointing third album'.
With hindsight it might just scrape into my Cure Top-5, behind Three Imaginary Boys...