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I have just looked a the possible purchase of a 1972 stag it has very good body work etc (2000 gbp)
The only thing that puts me off is it has been fitted with a 2.5 L 6 cyl engine.
If I was to purchase, who could I get the orignal v8 engine from? do I need to change the gearbox and diff back? What about engine mounting etc.
As the 2.5 L engine is very good I could re sell on Ebay
Just after some pointers in the right direction

Thanks

andrew, find out the relative values of a 2.5 litre stag compares to a v8 three litre and the costs of the engine conversion

then do the sums and add the value of your dreams in

you wouldn't get much for the engine, perhaps at most Â£250

the gbox, auto or manual, does that need changing?

the cost of a V8, triumph or rover??

what's wrong with a 2.5 six stag anyway?? unless you're a purist

jonath

The only significant thing to check in my mind would be the front suspension height, the V8 was a fairly heavy engine, so if the 2.5 was lighter, unless the suspension was modded to compensate, you may find it a bit high at the front with a consequential effect on the handling. - Many Stags had the 2.5pi engine fitted retrospectively, and I think I read somewhere that it was once thought that it would be offered with this engine as new, but events conspired against it.

As some have suggested, the Stag was originally designed around the straight six with the V8 to come along a little later to add further glitz to the range. The bodyshell, suspension and transmission were all based on saloon components, so there should be a good deal of interchangeability, at least in terms of physical connections (the Stag components may be uprated or stronger).
The weight of the straight six and iron blocked Stag are similar, so I doubt the springs have been changed. (The alloy blocked Rover V8 is substantially lighter, so the front springs SHOULD be changed when converting). In any case, it should be a simple task to fit a pair of new Stag springs to the car if needed.
I also doubt the gearbox has been changed, but if it HAS, then you would probably need a genuine Stag box to go with the engine. The box in the Stag is stronger than the saloon box if I recall correctly. (Above comments apply to manual boxes; any BW35 or 65 should be able to cope with the Stag output in ordinary use).
Swapping engineas and boxes should be relatively straightforward as the mounting points are very similar, but it's always the odd LITTLE differences which cause the most grief!
As to whether or not to buy, I suppose it may depend on why you want a Stag. If it is primarily the style of the car, and it's excellent blend of refined soft top and hard top luxury coupe, then the 2.5 engine will still move the car along well enough and smoothly enough to be enjoyable. If however you are buying it for the extra performance and the amazing exhaust "woofle" (no other word for it!) then only the V8 will do. That said, if the bodywork is worth the money and the transmission and suspension is sound, then changing to the V8 is feasible and could be cost effective if the original price is right.

Stag gearboxes are not the same as saloon or TR boxes. They have different ratios and are uprated in some areas.

Cheers

Colin

It's worth mentioning that Â£2k is very cheap for a good Stag.

This is based on my research in to fitting a Stag V8 in to a 2000 body, so I'm guessing the same/reverse is true going the other way...

You'll need:
- Engine.
- Gearbox.
- Engine mounts.
- Exhaust.

So, my brain being a Stag Free Zone, only driving a Spitfire(and others) :

Is Â£2500.00 too much for a 2.5l Stag?
The 2.5. was the original spec?

Mike

The Stag only ever came out of the factory with one engine available to the public, the Triumph designed 3 litre v8. That engine was only ever fitted to the Stag although it will fit in the 2000 engine bay and Triumph made several v8 2000s in Experimental - essetially the Stag engine was only available to the public in the Stag body.
Your biggest challenge in a Stag is rust, so if I was offered a sound 2.5 litre Stag that didn't need welding I would think Â£2500 was a good price. You will struggle to find a Stag v8 engine although they are around, usually packaged in a rusy Stag!

It might be worth you talking to enginuity, Tony Hart (of Hart racing) is now working with them, i'm sure he's done the conversion both ways and so will be able to tell you what you'll need, supply a V8 engine and other parts etc. Or give you a quote if you arn't doing the work yourself. They are based in London.

Section : General

Stag fitted with 2.5 L straight 6

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