engine change 4.0 /4.6

im going to be cahnging my engine soon but im thinking of putting a 4.6 in as i have a 4.0 at the moment. my questioin is are the looms and ecu's the same i would i need to change them to. thanks


Also im starting to hate my range rover.

Don't forget the gearboxes are different.

The Engine ecu has different programme for the 4.6

kooky_guy said:

Don't forget the gearboxes are different.

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Dint know that thanks.

Irishrover said:

The Engine ecu has different programme for the 4.6

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Thanks not gunna bother changing now thought thay were a straight swap. Plus a 4.0 seem to be cheaper to buy and not as prone to slipped liners

i have a good old 3.9 block in mine with 4.6 internals !

new shells rings cam and followers, running on a 4.0 ecu, runs very well on petrol and lpg


so whats the gearbox difference ????

i put a 4.6 block in my 4.0 with no problems still running on 4.0 ecu and 4.0 gear box..

mark 4x4 said:

i have a good old 3.9 block in mine with 4.6 internals !

new shells rings cam and followers, running on a 4.0 ecu, runs very well on petrol and lpg


so whats the gearbox difference ????

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Different models. Think they'll both fit the engine tho. The 4.0 box (hp22?) is lower rated powerwise.

kooky_guy said:

Different models. Think they'll both fit the engine tho. The 4.0 box (hp22?) is lower rated powerwise.

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i will have to remember that when iam giving some lol