The AJ126 petrol V6 used in the X351 was one of the most bizarre engines fitted to a modern car. It used the cylinder block from Jag's V8 with two cylinders blanked off. It sounds like a bodge but it worked well enough. (2/3)
https://www.caranddriver.com/news/a15349070/block-party-creating-a-v-6-by-declaring-two-cylinders-redundant/