Belly of the Beast

Here is a scan from the shop manual showing the largest engine ever put into a passenger automobile - the 500 cubic inch V-8 Eldorado engine.

Back in the 1930's, Cadillac made V-12s and V-16s, with displacements of 368 ci and 452 ci, respectively.

Jaguar also made a 5.3 litre V-12 in the 1970's, which is about 325 cubic inches.