Is the Range Rover 4.6 (P38) different than the Disco 4.6?
#1
#2
Depends.
Some P-38's used the GEMS engine, even came in a GEMS 4.6, later models used the Bosch engine.
So you will need to see a pic of the engine.
GEMS vs BOSCH Engines - Discovery I, Series II, Range Rover 4.0 & 4,6 - Tech Tips at RoverParts.com
Some P-38's used the GEMS engine, even came in a GEMS 4.6, later models used the Bosch engine.
So you will need to see a pic of the engine.
GEMS vs BOSCH Engines - Discovery I, Series II, Range Rover 4.0 & 4,6 - Tech Tips at RoverParts.com
#3
they are pretty much the same except that the crank position sensor mounting is different between the two. If you are looking to put a 4.6 into a D1 the GEMS 4.6 is the way to go. If you are going the other route and need a donor to fit into a later bosch motor car then it will require a little bit of modding..
#4
#6
#7
overall its the same block as the 4.0, different crank and pistons are what makes the bump in displacement. IIRC like i said before i think the only real difference between the bosch and gems motors is the crank position sensor mounting. Same bore between both the 4.0 and the 4.6 blocks. I will defer to someone who has actually laid hands on a 4.6 block though..