School me on the 4.2L V8 - Defender Source
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  #1  
Old June 19th, 2014, 08:30 AM
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Question School me on the 4.2L V8

Is the 4.2L V8 a easy swap into a 95 NAS D90?
Are these better engines than the 3.9?
Do they suffer from dropped liners?
With the 4.2L having a dizzy, seams like the swap would be straight forward.

I've read about the 4.6L, seams like a headache dealing with the ecu and cooling issues...

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  #2  
Old June 19th, 2014, 09:09 AM
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plug and play, same engine with a longer stroke.

http://www.thewedgeshop.com/rover-v81.html
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  #3  
Old June 19th, 2014, 09:12 AM
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I have loved the ones I have owned. Great engines.
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  #4  
Old June 19th, 2014, 09:46 AM
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Ive got one waiting for my Hunter. I imagine it would really be nice in the Defender, I cant bring myself to swap the 90.
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  #5  
Old June 19th, 2014, 10:15 AM
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Would the standard 3.9l radiator and ecu work for the 4.2l?
What is the hp and tq for the 4.2l?
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  #6  
Old June 19th, 2014, 10:17 AM
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4.6 issues? Your running a 14cux correct? If your current 3.9 is good use it as a donor and get a 4.6 block or 4.0 block with 4.6 pistons and rods. I would put an aftermarket cam in it like Jimmy, and you can leave the 14cux alone or have it programmed/chipped for the 4.6 for extra hp from what I understand. I haven't messed with the Ecu at all. Build the 4.6 block with the 3.9 timing cover and dist, this way you avoid the wiring issues and get most of the benefits from the 4.6. That's the way I would go after doing the last one at the shop, I wouldn't waste my time with a 4.2 unless you already have one sitting at the house. This 4.6 set up would probably be around 220-240 hp with the cam.
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Old June 19th, 2014, 10:31 AM
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Quote:
Originally Posted by Grover View Post
Would the standard 3.9l radiator and ecu work for the 4.2l?
What is the hp and tq for the 4.2l?
Radiator is the same. A 4.2 is a factory stroked 3.9. Its best if you can get a 4.2 ecu but it will run fine on the 3.9 one.
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  #8  
Old June 19th, 2014, 10:35 AM
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So I could in theory throw a 4.2 crank in my 3.9?
Is the 4.2 a stronger block than the 3.9?
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  #9  
Old June 19th, 2014, 10:38 AM
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So I could in theory throw a 4.2 crank in my 3.9?
Is the 4.2 a stronger block than the 3.9?
No. Pistons are the killer. NLA.
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  #10  
Old June 19th, 2014, 10:48 AM
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Replacing the engine for an extra 20hp is a waste of time unless you already have a bad motor and access to a cheap 4.2L. You'd probably be happier would an upgraded cam in your 3.9. The vast majority of 4.6L motors have no issues, I wouldn't be afraid of them.
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  #11  
Old June 19th, 2014, 11:06 AM
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4.6

Quote:
Originally Posted by Brewie212 View Post
This 4.6 set up would probably be around $220-240 with the cam.
Where can I get a 4.6 set up with a cam for $220? I'm interested.
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  #12  
Old June 19th, 2014, 11:10 AM
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Quote:
Originally Posted by One Ten View Post
Where can I get a 4.6 set up with a cam for $220? I'm interested.
sorry was talking about HP not cost I fixed it. More like $2200
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  #13  
Old June 19th, 2014, 11:13 AM
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Ah, that makes more sense
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  #14  
Old June 19th, 2014, 11:14 AM
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there are a number of recipes for the 215. a cam and minor head porting helps and is relatively inexpensive. I find the biggest downfall to these engines is the ZF, I despise the slushbox. The zf is a great transmission but the R380 with its shortcomings is much more enjoyable to drive.

later cux blocks had the provisions for cross bolted mains.
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  #15  
Old June 19th, 2014, 11:25 AM
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Quote:
Originally Posted by rover4x4 View Post
there are a number of recipes for the 215. a cam and minor head porting helps and is relatively inexpensive. I find the biggest downfall to these engines is the ZF, I despise the slushbox. The zf is a great transmission but the R380 with its shortcomings is much more enjoyable to drive.

later cux blocks had the provisions for cross bolted mains.
I wasn't aware of any advantages of the R380 other than the novelty of driving a manual transmission.
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  #16  
Old June 19th, 2014, 11:35 AM
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If it is a 1995 4.2 it is a serpentine belt engine, just FYI. I'm sure it can easily be made to work, but it's not going to be as drop in as a 94 and earlier 4.2
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  #17  
Old June 19th, 2014, 12:02 PM
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Originally Posted by Jymmiejamz View Post
I wasn't aware of any advantages of the R380 other than the novelty of driving a manual transmission.
Phillip is just talking crazy.

Nothing worse than driving a good trail, having to shift gears, then spilling your beer or scotch.


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  #18  
Old June 19th, 2014, 12:05 PM
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Phillip is just talking crazy.

Nothing worse than driving a good trail, having to shift gears, then spilling your beer or scotch.


.
well in my case my coffee or latte, it is also hard to send snapchats and text messages while changing gears. I dont go offroading
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  #19  
Old June 19th, 2014, 12:06 PM
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Quote:
Originally Posted by Jymmiejamz View Post
I wasn't aware of any advantages of the R380 other than the novelty of driving a manual transmission.
Its a major anti theft device in the US ....
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  #20  
Old June 19th, 2014, 01:50 PM
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Its a major anti theft device in the US ....
Crazy isn't it. I am of the mind set that people should be tested on a manual gearbox before getting their licenses. And it is the main reason I could care less about most new cars these days. I don't care how much more efficient the new autos gearboxes are.

I like the manual for off road use better as well.
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