The Diesel is a PSA jobbie, but the V8 was designed from scratch by Jaguar, Jaguar were given a budget to design a variable valve timing system for the upcoming small block Ford engine that they had been developing at huge cost for nearly 10 years. Jaguar had other ideas and designed their own engine. Ford were livid - they gave explicit instructions to Jaguar to abandon any engine development projects when they took over.
Angry Ford took the AJV8 back to Dearborn to test it, it was smaller, more powerful and more fuel efficient than the in house Ford project. To rub salt into the wounds it doubled the meantime-before-failure test on the dyno despite having a (1,500rpm) higher rev-ceiling. They asked Jag to develop a low tech version for Lincoln, the in-house Ford project was quietly dropped (actually the engine appeared in the truck division) Ford then pretended they helped develop the AJV8 - nonsense. I worked there at the time.