The 2.7 TdV6 is the result of a joint Ford-Peugeot project (Peugeot make very good diesels and have quite a side-line building/selling them to other companies, especially to India and China).
It's the same engine fitted to the Jaguar S-type diesel. The Jag version has twin turbos (one per bank), whilst the Landy version has one big turbo set up for low-speed torque (the result being more torque at a lower speed than the Td5). It also has more fuel/air filters, better seals for wading and a different oil sump to supply oil when the engine's at crazy angles.
The 4.4 V8 petrol is a long-stroke version of the Jaguar 4.2 V8 used in the XK8 and the XJS (the 4.2 engine with a supercharger is used in the Jag XK5, XJR and Land Rover are fitting it to the Range Rover Sport and the 2006 Range Rover).
So, the diesel is Ford/Peugeot designed and first launched in a Jaguar. The V8 was developed by Jaguar with Ford money
Jack
