Land Rover engine HP

sterid01, Jun 12, 4:21pm
Hi guys I have just replaced the engine in my range rover with a land rover engine and have just found out that the LR engine is about 50 HP less , I was wondering if anyone knew how they reduce it, im thinking either carb or inlet manifold , I think the compression is the same , apparently they reduced it to make the RR sell more . any ideas . thanks

mgmad, Jun 12, 4:59pm
Which Land Rover, which Range Rover!

sterid01, Jun 12, 5:45pm
Range rover - 81
Land Rover defender - 83
Sorry

mgmad, Jun 12, 6:05pm
A quick wiki suggests, presuming both are V8s, that the defender used a low CR 3.5 V8 at about 113 bhp, compared to the 135 bhp of the RR. Not quite 50 bhp, but seems quite a lot of power to lose just from a drop in CR to me.

msi, Jun 12, 10:59pm
CR stamped on the block next to dip-stick

mram, Jun 13, 4:57am
Land Rover stage 1 and early one ten were 8.35:1 compression, They had restrictor plates in the manifold to reduce the horsepower, reason being rover felt the V8 was too fast with a vehicle(stage1) that still had drums all round

sterid01, Jun 13, 6:41am
Both engines have 8.31:1 ratio , mram can these be removed or do I need to get my manifold from the RR engine back .

sterid01, Jun 13, 10:03am
also is the restrictor plate just in the inlet manifold or both . cheers

elect70, Jun 13, 11:01am
Swapmanifolds & carbs

msi, Jun 13, 4:48pm
Unbolt both carbs and you will see them just pull them out

westygirl1, Jun 13, 5:28pm
must note this for future ref. in process of rebuilding engine from stage 1. possibly to be put into a forward control. might have to do this

gofer0007, Jun 14, 10:42am
I did RR heads and stage one cam on my 3.8 V8 Disco and hops along so much better.Bucket loads of fun for towing the V8 off roader on the trailer.