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Thread: 4.2 to r380

  1. 29th November 2010, 06:49 PM #1
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    4.2 to r380

    hi all would a 4.2 rover motor bolt strait up to a r380 ? thanks tony
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  2. 29th November 2010, 06:53 PM #2
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    A V8 R380 - yes.

    3.5, 3.9, 4.0, 4.2, 4.6 are basically the same at the back end.
    Scott
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  3. 29th November 2010, 07:13 PM #3
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    cool ta mate
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  4. 29th November 2010, 09:20 PM #4
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    Where are you getting a 4.2? They were never released in Australia.
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  5. 30th November 2010, 08:44 AM #5
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    hey BJ yeah i was bidding on one one fleabay in sydney ,complete 87 classic with 4.2 . i missed out on it , sold for $630 would have been nice in the old rangie. the boss is starting to put the pressure on to sell it and put the money towards the disco as she dosent want her 92rrc chopped to fit the 33's and we cant aford to run 3 car's. i'm finding it hard to let go of the old girl everything is already there just a sad motor.tony
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  6. 30th November 2010, 04:24 PM #6
    PhilipA
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    The odds are its a 3.5 with stroker kit, so the correct question perhaps should be about 3.5s
    If you list the engine number an expert will be able to tell you what the engine is.
    Regards Philip A
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  7. 30th November 2010, 04:53 PM #7
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    Quote Originally Posted by PhilipA View Post
    The odds are its a 3.5 with stroker kit, so the correct question perhaps should be about 3.5s
    If you list the engine number an expert will be able to tell you what the engine is.
    Regards Philip A
    Ditto. I had one like that through my place that ended up in a mate's 87 RRC. Nice engine for towing it is.
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  8. 30th November 2010, 05:44 PM #8
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    I have a stroker crank for my 3.5, just need to find the time to rebuild the engine, then refit it.
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  9. 13th December 2010, 09:25 PM #9
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    4.2's in aus

    Quote Originally Posted by BigJon View Post
    Where are you getting a 4.2? They were never released in Australia.
    The 4.2l V8 was an option on the very last of the classics, LSE's and Autobigraphy's. I have seen a handful here in aus and they were sold through dealers
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  10. 14th December 2010, 12:55 AM #10
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    Bigjohn , when you say you have a stroker crank , is it the 3.030 stroke one ? fitting that will only take it out a 3.5 to 3.8 .So obviously you would be fitting the 3.9 Liners and pistons bringing the bore up from 3.5 to 3.7 then that will make it a 4.2 ? But if you had a crank with 3.330 stroke and just 3.5 bore then that would be 4.2 as well !
    Allways wondered why you cant fit the 4.4 P76 3.5" stroke crank , given the right rod length and Piston CR Probably wont fit in the case.Still ,I fit a 3.875 crank where once 3,030 was on my holden V8's (308 to 400 CI), Lots of grinding and grouting !!Just dreamin !!
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