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Discussion Starter · #1 ·
I have the chance to get an 88? Classic pretty cheap.
Belongs to a friend who has driven it for years.
Original engine is just flat worn out.

He has other engines that should be good to swap in.
Rebuilding the 3.5 is probably expensive.
He has a 3.9 from a Disco and a 4.2 from another RR I scrapped a while back.

I can pre-run the engines on a test stand if I can get the ignition and fuel to work outside the vehicle.

Which engine would be best to install assuming equal running condition?

In my part of Nevada we have no emission testing so I am free to use whatever engine I like.
At this altitude we lose some power, so any available gains to offset that would be nice.

Strait engine swap, or mix and match components?

I will want to retain the simplest ignition and fuel systems possible, that means keeping the distributor.
I have an Allen SEA and ETA set for tuning so long as I have a somewhat conventional ignition system.
 

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I would go with the 4.2 with condition being equal.
 

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Disco 3.9's had around 185hp when new. Range Rover 4.2's had 200hp, so I would take the 4.2L.

I would suggest a reseal with head gaskets and close inspection of the cam/lifters whatever unit you decide on.
 
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