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  #1  
Old March 3rd, 2015, 07:20 AM
Alimaz78
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Ali
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Whats the best V8 for the defender

I Currently have a 3.9 EFI but don't like the power and its reliability. So which is the best out of the land rover engine V8 family 3.5, 3.9, 4.2, 4.6? What about the 5.2 TVR/ROVER engine? I know it's the most expensive and powerful engine of them all but how does it compare with the 4.6
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  #2  
Old March 3rd, 2015, 07:26 AM
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If you really want power drop in a GM V8.

The Rover 4.6 in stock trim pushed out about 225hp =/-.
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A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.

I don't know about the brakes, only their unreliability.
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  #3  
Old March 3rd, 2015, 07:45 AM
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Honestly, if you don't like a 3.9 efi, why would you consider any other derivative? They all share the same issues.

While there is a lot of talk about the GM engines, I'd be far more tempted by a Coyote. Just me tho.
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  #4  
Old March 3rd, 2015, 07:54 AM
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I'm convinced the 4.0 GEMS is a good balance of HP and reliability. I have been driving the same GEMS 4.0 going on 11 years and about 110k miles. It has been my daily driver and trail rig.

Hanging out on this forum has taught me that sometimes the more you ask for from these trucks the more you are expected to give in return somewhere else.

Clay
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  #5  
Old March 3rd, 2015, 07:58 AM
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Quote:
Originally Posted by o2batsea View Post
Honestly, if you don't like a 3.9 efi, why would you consider any other derivative? They all share the same issues.

While there is a lot of talk about the GM engines, I'd be far more tempted by a Coyote. Just me tho.

WHY ever think of anything when there is the coyote.....
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  #6  
Old March 3rd, 2015, 08:01 AM
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Quote:
Originally Posted by 1of40 View Post
I'm convinced the 4.0 GEMS is a good balance of HP and reliability. I have been driving the same GEMS 4.0 going on 11 years and about 110k miles. It has been my daily driver and trail rig.

Hanging out on this forum has taught me that sometimes the more you ask for from these trucks the more you are expected to give in return somewhere else.

Clay
X2 on what Clay said. I had my 4.0 GEMS on my 99D1 since new, while it's not my daily driver anymore, it's been a great balance. Took lots of trips with it, and have crossed 30+ different state borders and the only time it was ever on a flat bed was when I dunked it on a lake up in Wurtsboro back in 2001. I can honestly say it now has 150K trouble-free miles and would not hesitate to drive it anywhere.

I hope I didn't just jinxed it...
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  #7  
Old March 3rd, 2015, 08:02 AM
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Ray Gerber
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Ali-
Not sure where you get work done but down here in Abu Dhabi there is a guy over in Musaffah that does a ton of Rover work (Abu Askoor)...when I took my LR3 in there for 90K service he was swapping out a D1's engine for a 4.6.

Personal opinion is the quest for power outside the LR engine will result in a truck that is likely unreliable. If I were you I'd push the threshold with a 4.6 and if it blows...well...the great thing about the UAE is there are plenty of other motors to throw in next!
r-
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  #8  
Old March 3rd, 2015, 08:20 AM
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Quote:
Originally Posted by Alimaz78 View Post
I Currently have a 3.9 EFI but don't like the power and its reliability. So which is the best out of the land rover engine V8 family 3.5, 3.9, 4.2, 4.6? What about the 5.2 TVR/ROVER engine? I know it's the most expensive and powerful engine of them all but how does it compare with the 4.6
Quote:
Originally Posted by o2batsea View Post
Honestly, if you don't like a 3.9 efi, why would you consider any other derivative? They all share the same issues.
Exactly.
The Rover V8s are often unreliable.
Instead of leaving a lip at the bottom of the cylinder, Land Rover punched them all the way through and depended on loctite to hold the cast iron liners in place.
Overheat it once and the liners drop, rendering the engine useless.
Have personally scrapped dozens of Rover V8s and with the exception of a Disco, we haven't converted yet, would never run a Rover V8.
So to answer your question: None of them.
There are better options in the diesel world or the engine conversion route if you want to stick with V8 gas, GM small block suggested by Chris.
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Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

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  #9  
Old March 3rd, 2015, 09:04 AM
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Quote:
Originally Posted by rdavisinva View Post
Exactly.
Overheat it once and the liners drop, rendering the engine useless.
All the more reasons not to increase the displacement. Keep it at 3.9/4.0l, stay on top of the maintenance, and call it a day. I don't see the need for additional power in a D90 that just taxes the cooling system and drivetrain for $$ repairs and downtime in the future. Recall the D90 is ~ 775 to 850 lbs lighter than a D110 or D1, respectively. With with 182 hp on tap, the D90 is ~ 19.7 lb/hp from the factory. You would need 221 hp in a D110 or 226 hp in a D1 to equal the lighter D90. Similar gains required for the torque.
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  #10  
Old March 3rd, 2015, 09:30 AM
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Ray Gerber
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I don't want to speak for the OP but I would suggest some contextual awareness...the roads in the UAE don't really lend themselves to plodding diesels, the quest for power is as much for safety as anything. Between Abu Dhabi and Dubai I frequently get overtaken while cruising at 85mph by cars moving well over 100-that isn't even unusual on the roads-nevermind the super cars that abound. Wringing out a 3.9 at high RPMs to do 65-70 puts you in the far right with the dump trucks.
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  #11  
Old March 3rd, 2015, 11:24 AM
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The boosted Roush Coyote will fit nicely and has 600 ponies.

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1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

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  #12  
Old March 3rd, 2015, 11:45 AM
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Quote:
Originally Posted by o2batsea View Post
The boosted Roush Coyote will fit nicely and has 600 ponies.

Many more options for accessories, relocation brackets etc on an LS motor… Wheres that alternator going to go so it doesnt hit your power steering box?
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  #13  
Old March 3rd, 2015, 11:54 AM
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Derek Borror
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Post your video your Palm Valley bridge crossing....that will convince anyone on which way to go!

Quote:
Originally Posted by phoenix37 View Post
Many more options for accessories, relocation brackets etc on an LS motor… Wheres that alternator going to go so it doesnt hit your power steering box?
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  #14  
Old March 3rd, 2015, 12:07 PM
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Quote:
Originally Posted by o2batsea View Post
The boosted Roush Coyote will fit nicely and has 600 ponies.

Love it. But if you are going big and going to drop ~$20 large on a conversion, hold off for Ford's 5.2L flat plane crank V-8. Jump to the 1:05 mark for the music.
The Shelby GT350 Mustang's Flat Plane V8 Sounds As Great As You Imagine
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  #15  
Old March 3rd, 2015, 12:30 PM
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Quote:
Originally Posted by Ray_G View Post
Wringing out a 3.9 at high RPMs to do 65-70 puts you in the far right with the dump trucks.
Isn't that where rovers belong? Its a tractor...
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  #16  
Old March 3rd, 2015, 12:38 PM
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Quote:
Originally Posted by Ray_G View Post
Personal opinion is the quest for power outside the LR engine will result in a truck that is likely unreliable. If I were you I'd push the threshold with a 4.6 and if it blows...well...the great thing about the UAE is there are plenty of other motors to throw in next!
r-
Ray
Why bother pushing the envelope with the LR motor.... throw in a ultra reliable LS of whatever flavor floats your boat.... sensible 295bhp 5.3 LM7 to a nice 600bhp supercharged lump, drive the thing knowing it'll give you many miles of reliability.

If the electronics were sorted already I'd have stuck an LS in my D2 rather than a newly rebuilt 4.6.... prob would have been cheaper too !
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  #17  
Old March 3rd, 2015, 12:59 PM
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Ray Gerber
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Quote:
Originally Posted by toad View Post
Isn't that where rovers belong? Its a tractor...
Well at least some of y'all admit that-while others want power windows! Seriously, out here not being able to get out of your own way is not fun at all. Roads are better than the US's and much faster.

Re the logic of the LS conversion-for as much as it's talked about online you would think every 3.9 and 4.0 would be swapped out by now it's so easy and makes so much sense. Yet the #'s don't bear that out and I'd submit it is bc it's a lot more work and a good chunk of $$$ even if you have the tools and facilities.

R-
Ray
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  #18  
Old March 4th, 2015, 06:49 AM
Alimaz78
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1993 110 pickup
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Quote:
Originally Posted by Landy_Andy View Post
Why bother pushing the envelope with the LR motor.... throw in a ultra reliable LS of whatever flavor floats your boat.... sensible 295bhp 5.3 LM7 to a nice 600bhp supercharged lump, drive the thing knowing it'll give you many miles of reliability. If the electronics were sorted already I'd have stuck an LS in my D2 rather than a newly rebuilt 4.6.... prob would have been cheaper too !
but would the gear and deffs. handle the power of an LS engine?
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  #19  
Old March 4th, 2015, 07:11 AM
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Chris
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Quote:
Originally Posted by down_shift View Post
Love it. But if you are going big and going to drop ~$20 large on a conversion, hold off for Ford's 5.2L flat plane crank V-8. Jump to the 1:05 mark for the music.
The Shelby GT350 Mustang's Flat Plane V8 Sounds As Great As You Imagine
OMG.....what an incredible sound to that engine...
They should overdub the MGM Lion roar with that sound
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A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.

I don't know about the brakes, only their unreliability.
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  #20  
Old March 4th, 2015, 07:57 AM
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Jason Crandall
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Quote:
Originally Posted by Ray_G View Post
Well at least some of y'all admit that-while others want power windows! Seriously, out here not being able to get out of your own way is not fun at all. Roads are better than the US's and much faster.

Re the logic of the LS conversion-for as much as it's talked about online you would think every 3.9 and 4.0 would be swapped out by now it's so easy and makes so much sense. Yet the #'s don't bear that out and I'd submit it is bc it's a lot more work and a good chunk of $$$ even if you have the tools and facilities.

R-
Ray
My 110 is getting a 4.6 right now. An LS conversion is going on in the same shop. The LS is a lot more involved.
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