Yes, I totally agree with this and I can see how the XJS was a victim of the, then, on-going mid seventies unfortunate American trend with large two door cars that looked like the result of a design engineers' contest of who can design the largest and heaviest car with the least interior room and the smallest trunk, where some had such a long engine bay that the motor sat all the way back and using hardly half of the room in there... I can remember the Chevy Monte Carlo, the Buick Regal, Olds Cutlass, Chrysler Cordoba, Ford Thunderbird and my very own 1975 Ford Elite, the very model year that the XJS came out. And, of course, the ultimate American influence on the XJS body style, none other than the Chevy Camaro and the Pontiac Firebird that had come out exactly five years ahead of the XJS. Talk about the epitome of inefficiency in the use of room, although I don't remember my Elite being so tight in the cabin, considering that I was bigger then than now. My series II XJ12 was certainly more comfy to live in and to turn my torso around without bumping my head to something. Yes, large on the outside and deceivingly small inside, where you need room the most.

But, in the end it doesn't matter because beauty overcomes everything...

Cheers,

 

needs more ash trays...

 

Convertible only (top that folds deeper in body), facelift XJS design only, plastic gas tank, place a reliable, non faulty ecu in location where water cannot get into it and damage it. Ignition coils that are reasonably priced, a tps that can be adjusted without a computer, abundant aftermarket parts supply that do not become scarce and are reasonably priced. 8 cyl pushrod engine.

 

This has to be a wind up.

 

A pushrod V8? In a Jaguar??

All of the things mentioned above can be found in a Mustang or Camaro.
For it to be a Jag it would, at minimum have a SOHC. DOHC would be preferred.

Mark

 

And it needs to have more than 2 valves per cylinder...

But I still think a Jaguar Gt should still have a V12...

 

For the coupe. How about a few more inches in the back so adults could sit there. Perhaps even LED bulbs for lighting. I would ask for no styling changes. It has delicate lines and dramatically gorgeous!

 

Did you hear that Ferrari is going to use the Dodge Hellcat V8? While twin cams, V12's sound and look cool it is hard to beat the reliability and power of the new all aluminum block/head American V8's which is why Ferrari is going to use the Hellcat engine that puts out over 700 HP much more reliably and cost effective than their V12's. The Hellcat is the fastest production car at a fraction of the Euro exotics which I guess is why Ferrari is going to use American pushrod V8 instead of their V12's.


You can get the GM aluminum block/head small block LS3's create engines from Mast Performance that put out a reliable 630 HP all motor no blower/turbo Mast Motorsports High Performance Powertrain Solutions
or the same small block with a whipple supercharger at 750 HP Mast Motorsports High Performance Powertrain Solutions


If the car can fit a big block then you are looking at 700 HP all motor with no special induction Mast Motorsports High Performance Powertrain Solutions


or 1000 HP Mast Motorsports High Performance Powertrain Solutions


These engines will keep the Jaguar cost down yet provide the power to be at the top of the food chain in power, weight and reliability.


My 3.8s is running a 460 HP all motor LS1, is a daily driver and will pull 0-60 around 3.9 seconds. I have raced the Tesla and it was a dead heat from 0-120. I am thinking of the LS3 630 HP engine after I put 300,000 miles on this engine. That is the other thing with these new V8 engines they are super reliable and will run 250,000 to 350,000 even at those performance levels, try coming close to that with a V12 you will be spending a crazy amount of money and it will not be reliable.

 

It is long after April 1st to still be pushing the Hellcat/Ferrari BS. Yes, it was an April Fools joke, but I guess trolls haven't figured it out.

 

If you are looking at fantasy Jaguar it would be better with an American aluminum block V8 as even the mighty F-type Project 7 is only putting down 567 HP and doing a 0-60 about the same 3.9 seconds as my car. A dream Jaguar should have much more power yet still be reliable.

 

Well, all that Aston V12 talk and American V8 talk sounds interesting, but I I think I'd stick to my original idea of, yes, going wild, but still staying Jaguar, in which case it would have to be an engine like the F-Type SVR with its 575 ponies. True that OB's original plan did not limit the "dream" to necessarily a Jag power plant, but to stay "XJS" it must also stay "Jaguar", I think, otherwise it's not a Jag...

Cheers,

 

Exactly what evidence do you have that the Hellcat engine is "reliable"?

The only person I know who bought one had to have an engine warranty replacement after only a few thousand miles.

 

I see Chrysler Corp is continuing their tradition of designing fine boat anchors.

 

That would be a durability issue, not a reliability issue


Cheers
DD

 

this has gotten a little.... what ever...


I went and looked at a used Aston Martin DB9
and it comes stock with a V12 that FORD decided to let Aston have and not JagUar...
the 2016 has 540 out of 6.0 V12
MPG: 13 city / 19 highway (same as the XJS)


so I will just fore go all the what if's and pic up a nice used one (DB9 Convertible)
and if I get fussy retro I can take it to a customizer ( like Chip Fooze ) and have at a retro XJS body modification....


least amount of trouble for the car JagUar SHOULD be making....


though I would think these days they would have gone with a base model 4.5 liter V12 with 400 hp one as the base model....


and that V12 is based on the DURATECH.... (just two of them)
the 2009 only has 470 hp... that is the one I looked at here used...

 

Iirc the Aston V12 has some basic Jaguar XJ13 attributes (the testbed car for a quadcam V12 from Shaguar). I'd love some quad cams... That would give the V12 the power it should be making. There are people who have managed to fit AJ16 heads... Don't ask me how, as the would be two different lengths in order to work the V12 properly...

 

Rear (mid) engine V12.
Give it the general shape of a Maserati Bora, with a little bit more more bulging.


And if the back seat can't be large enough for an adult, then don't bother with one.

 

My experience with American V8's has been very good. I know people with the Dodges and have not heard any issues. For me personally I have a LOT of experience with the GM LS V8's and I can tell you from real life experience of both high performance GM LS V8's and my company fleet of GM LS V8's that they both reliably run 250,000 miles plus and all of these are driven hard. The popularity of these LS engines being used in so many restomods are due to their incredible power and reliability. I do think an aluminum block/head American V8 would be a great engine and the GM LS is probably the least expensive most popular of the American V8's.


The new Jaguar engines are decent but I do not think an ultimate Jag would be impressive if it does not have horsepower of at least 625HP and ideally more like 700-1000 HP. The only reliable engines of that performance at a reasonable price is the LS and American V8's. If Jag can make an engine over 700 HP that is reliable enough to run over 250,000 miles great but I have yet to see anything even close to that...

 

Think cup holders. Otherwise just fine,Do you want a perfect car?
than what would be left for us to bitch about and fix?
bill

 

I imagine that none of those fleet engines are 700HP versions.



Is it that Jag can't, or is that it that so far nobody really has?

Engineering is usually about tradeoffs -- 250K miles of reliable service vs. 700-1000HP is likely to be one of those tradeoffs.

I wonder what the highest mileage Bugatti Veyron is in existence?