4.6L vs 4.4L/4.2L - Defender Source
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  #1  
Old September 20th, 2006, 03:59 PM
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4.6L vs 4.4L/4.2L

What are the differences between the engines that are in the newest Model Range Rovers (4.4L and 4.2L) and the 4.6L that isn't offered by them anymore. I see that the Liter size and horsepower is different, but what other things have changed? Is the newer Engines better, could they fit in a D-90 as well? Pros and Cons?

http://www.landroverusa.com/us/en/Ve...nd_Options.htm

This taken from ECR's Website http://www.eastcoastrover.com/RoverV8.html

Some other 0-60 times for your comparison: (figures from Motor-Trend Magazine 1998)
1998 Range Rover 4.6 HSE "Callaway Ltd. Edition" 0-60 in 8.4 seconds
1998 Range Rover 4.6 HSE Vitesse 0-60 in 9.7 seconds

Love the stats on the INTERCEPTOR 5.2, I'm afraid to ask what the price for one. http://www.eastcoastrover.com/52V8.html

Ade
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  #2  
Old September 20th, 2006, 04:09 PM
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4.2s can be problematic. Rover developed the cross bolted mains to deal with 4.2 crank deflection. We see many more dead 4.2s that 3.9s so that says something.
Plus finiding one today is tough unlessit is rebuilt and then you gotta find the right rebuiolder, not just any shop. 4.2 was offered from 1993-1995

The Jaguar based 4.4 won't fit your 90.

A 4.0 or 4.6 will, lots of options there from long block to short block. No major mods needed, basically bolts in as a stripped engine.

Forget the 5.2. Its a lot of fun, but only for horsepower nutz with a wallet full. Even I don't have one and I am a serious HP freak.
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Old September 20th, 2006, 04:09 PM
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4.4 is a BMW engine

Hey Ade,

I'm not going to proclaim to be an expert on the subject, but the 4.4 liter V8 in the latest body style Range Rover is a BMW V8, same engine that is in a 4.4 BMW X5. May be a nie engine (don't know), but I would think it would certainly be a more complex swap than a 4.6 Rover (old GM engine) V8 would be.

Also interesting was that South African Market (and built) D-90s were available with BMW straight six powerplants for a while in the late 90's. I'm sure the vast majority of members here are already aware of this, but it went along with the theme of your question. And not that I'd want to swap that, but like I said, since we are talking BMW engines in Land Rovers...
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  #4  
Old September 20th, 2006, 04:10 PM
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Aren't the 4.2 (supercharged) and the 4.4 (N/A) the Jaguar engines?

The 3.5 / 3.9 / 4.0 / 4.2 and 4.6 the Rover, nee Buick engines ..
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  #5  
Old September 20th, 2006, 09:24 PM
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2003-2005 RR HSE was 4.4 BMW Powered
2006 RR was 4.4 or 4.2 supercharged Jag powered

Mike is right 1993-1995 RR original body style used a Rover/Buick 4.2

Eric
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  #6  
Old September 21st, 2006, 02:29 AM
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As far as I know, the 4.2 is one of the most robust versions of this engine...other than the 3.5 Carb version
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  #7  
Old September 21st, 2006, 08:42 AM
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This is what I see left from most of the 4.2s we work on. I don't call it "robust" at all:

http://www.eastcoastrover.com/102.html

In all the engine replacements we have done, we do far more LWB RRs and consider how many fewer LWBs (4.2s) there are to standard wheelbase RRs. So why do so many LWBs need engine? I say it is because the 4.2 sucks. If you disagree that is cool. I'm just telling you what I see from doing this every day.
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Old September 21st, 2006, 10:43 AM
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Mike thats a beautiful Classic!!!

drool drool
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