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This is definitely not one of those "thinking of buying this and doing that to it" hypothetical kind of threads, more of a "bought it now what to do with it" sort of things!
So that being said, I've got a '74 Series 3 in need of a total nut and bold resto so it's the perfect candidate for a decent powerplant. Currently running a mighty 2.25 diesel, I want something petrol, preferably a 4 banger and not shocking on fuel. Needs to be able to run infront of the standard Landy gearbox and running gear so nothing that will rip it to shreds! Thinking 1.8 K-series as fitted to the Freelander (with modified headstuds to avoid gasket issues) or something Volvo for ultimate reliability.
Shoot me your ideas and lets get something silly (but driveable) built!
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Last Edit: Oct 7, 2019 15:23:04 GMT by ratrodmog
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Tazzy
Part of things
Posts: 109
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Nissan Leaf?
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my choice would be M52B28, P38 box and transfer case off the M51d25q
or if thats too big then an m42
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why not diesel though? best engines for a landy are diesel
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There's nothing really wrong with a diesel, I'd just prefer a petrol 4 banger......but only if practical. I've seen the BMW conversions and they are interesting. I'm coming from a world of fitting a Zetec into a Morris Minor rather than keeping the underpowered A-series. Obviously I'm new to the world of Landys and I'm not sure what's possible.
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follow @bashsspeedshop on Instagram
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sowen
Club Retro Rides Member
Posts: 2,245
Club RR Member Number: 24
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The old Rover 2000 and 2200 engines from the P6 were fitted back in the day. I believe Perkins Prima conversion kits are still available and they are almost identical in fitment to the Rover O,M and T series engines so in theory you should be able to bolt one of those straight onto the existing gearbox. 2ltr twincam turbo if you're so inclined!
Then again do you want to do something different with the Volvo idea? Anything can be made to fit if you really want. Ford V6's and Rover V8's are the most common petrol engine swaps out there with off the shelf adapters back in the day. Even the Rover V8 could give better fuel economy than the 2.25 petrol on a run with the right gearing!
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The standard engine particularly the 5 main bearing ones can be made quite a bit better by increasing the compression ratio and adding an su carb, I had a series 2 like this.
Given the barn door aerodynamics it will never be great for fuel economy, road biased tyres, free wheel hubs, and rrc diffs or an overdrive all help. Mine had all of the above and would do mid to high 20's on a decent run.
Modern engines will help but not massively, especially if you use the extra power available most will also significantly de-value it
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jamesd1972
Club Retro Rides Member
Posts: 2,834 
Club RR Member Number: 40
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Rover did a 2.0MPI (rover 820) version of the disco but that would bolt to a permanent 4x4 box. Keeping the original gearbox to keep as a 4 x 2 will need an adapter plate, I'd be tempted to look at what adapter plates are available and work from there ? Won't take much power or torque to break it though. Otherwise the P38 box and a BMW engine appeals as @welshplug says. One other option would be to look out for a 2.5 petrol from an early 110. www.steveparkers.com/conversions/might be a good place to start. James P.S. google the M3 engined Disco for inspiration... |
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I can only advise you not to put in the Prima or Transit diesels, all that I have come across have been very disappointing. P38 box is no good for a swap as the transfer box is on the other side, therefore the diffs are also on the other side. Only petrol swap I have carried out was a Lexus v8 into a Tomcat with a Disco auto box. As said above, anything is possible if you are determined enough.
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Dez
Club Retro Rides Member
And I won't sit down. And I won't shut up. And most of all I will not grow up.
Posts: 11,712
Club RR Member Number: 34
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The ‘best’ series Land Rover I’ve driven with an engine swap was actually an Essex v6. Economy wasn’t any worse than the stock 4 pot but it had noticeably more power without feeling heavier or having to cut anything.
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madmog
Club Retro Rides Member
Posts: 1,152
Club RR Member Number: 46
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Mercedes diesel OM605 and 606 engine to Landrover conversions are popular - stay with me, the OM60X engines have the same bellhousing pattern as many of the mercedes petrol ones. So you could use the convertor kit to fit a petrol lump. In 4 cylinder there's old but tough and reliable the 2.0 and 2.3 M102 on carbs or injection, or the newer M111 going from 1.8 120bhp to 2.3 supercharged 190bhp with many steps in-between. Mercedes SLKs with the right supercharged engine can be had for less than £1000 - with MOT!. Buy the whole car sell the bits you don't want. I didn't even get started on the 6 cylinder petrols  |
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I know you said not diesel, but we’ve done the 200 and 300 tdi lumps, bolt in fit and still lr so bits easy, znd can be tweaked if theres not enough as standard
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Oct 23, 2019 20:50:44 GMT
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Got an old 70's 300d merceded 5 pot diesel in ours, adaptor looks home made, personally I would only put a diesel in
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It will come in handy even if you never use it
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glenanderson
Club Retro Rides Member
Posts: 4,091
Club RR Member Number: 64
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A 2.5 petrol engine from an early 90 or 110 will bolt up to the original gearbox and mounts, and can be dressed to look like a 2.25 if you like. Alternatively, if you can't find one, a late 5-bearing 2.25 can be rebuilt with a 2.5 crank, rods and pistons into a 2.5.
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My worst worry about dying is my wife selling my stuff for what I told her it cost...
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OM612, millions of them about in Sprinters that have turned to dust so cheap and readily available.
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When I had one I had ideas of taking a late 5 bearing 2.25 or 2.5 petrol and adding a low pressure turbo blowing through a SU, engine should be more than capable its common with the diesel.
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If it's a diesel engine in it now keep it a diesel, otherwise your getting into diff swaps ect to get the gearing somewhere near useable.
The sensible swaps are the 200tdi, or the merc om604/5/6.
I've done a few 200tdi swaps and they are a nice easy upgrade, but for my next swap I want to fit a cummins B series in there.
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1988 Mercedes w124 superturbo diesel 508hp
1996 Mercedes s124 e300 diesel wagon
1990 BMW E30 V8 M60 powered!
1999 BMW E46 323ci project car
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glenanderson
Club Retro Rides Member
Posts: 4,091
Club RR Member Number: 64
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A 200 Tdi really needs 3.54 diffs, and an overdrive, to make the most of the extra power. If the original engine is a standard 2.25 diesel then it’s highly likely that the diffs are the original 4.7:1 ones.
I run a 200 Tdi in my 109” and it’s perfect for my requirements, but they’re a bit agricultural for some people’s tastes.
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My worst worry about dying is my wife selling my stuff for what I told her it cost...
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Not sure if it's why the originator of the question asked but if you live around London , older diesel of any sort in commercials are pretty much a no go now, I suspect there are many people who will need to go petrol or sell the vehicle.
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If going for a petrol four-banger, I guess you'd want a lot of low-down torque; maybe the 2.5-litre Porsche 924S engine would be quite good, with 150bhp and 143lb/ft @ 3,000 rpm, quite an increase on Land Rover's 2.5 litre petrol engine which gave 83bhp @ 4,200 rpm and 133 lb/ft @ 2,000 rpm, then there's also a Subaru 'EJ' 2.5-litre flat four as used in Forresters, which gives around 173bhp @ 6,000 rpm and 170 lb/ft @ 3,800 rpm, and the 2nd generation Jeep Cherokee (XJ) had a 2.5 litre four-pot, giving 130 bhp @ 5,250 rpm and 149 lb/ft @ 3,250 rpm...
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