Samuel wrote:

Different Motor - Ofcourse
Different Gearbox - Nope - They all used the same Zf 5 Speed gearbox between 2002-2005.
Different Electronics - Only ECU & Wiring harness. Rest all I understand is the same.
Lastly, sell mine and buy a diesel - Would have already done that. But this one is my first and has been special so would like to do all it takes to bring her back to life

There are loads of bits different, but figured engine and gearbox were enough to allow a good idea/bad idea decision. 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

I’d look for a cheap TD6 donar car to make sure you have everything you need, and also act as a reference point for you.

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Just my 2P

DON'T DO IT !!!

IT WILL COST MORE THAN THROWING YOUR RR AWAY AND BUYING A TD6...

But it's your money and time.... Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Get a junkyard M62, do the timing guides, PCV, cam cover gaskets, fit and enjoy. Or just get a TDV8.

buy yourself a cheap tdv8, and sell the v8 non runner. the only thing you can change over, in reality, is the FFRR sticker in the rear window. TDV8's are real value these days, as diesel is falling out of favour. and they have some power, and economy.. find one with a couple of appearance issues, and work on that. changing engines, looms, programming ecu's, security, becm, is a nightmare. -spannering in a lump, might be the easy bit. coding it to run, is a minefield.
the old BMW engines are not bad engines. they just go brittle,, with the long term heat, (that they were built to run under) and thus, nylon internal parts break up. did the other engines have chain issues, or overheat-melted?