Does anyone have a set of technical specs and in-depth differences on the various 5L engine configurations? For example, the supercharged engine in the XKR has a higher compression ratio than the NA version. Are the other modifications to the engine on the higher power models like the XKR-S GT, F-Type SVR, etc?
I've seen one previous thread but it didn't have much detail, and Google is not returning anything. Hoping someone here has some technical resources. Thanks!

 

No, besides minor engineering adjustments over the years they’re all the same engine and blower, no hardware performance differences to date.

 

No technical resource as such but a few things I have learned over the years:
- SC versions have lower (not higher) compression ratios than the NA version. This is standard procedure for forced induction vs NA.
- SC versions have different pistons to the NA versions.
- The NA version was discontinued in 2012 when it was replaced with the AJ126 V6 (which in turn is based on the AJ133 V8).
- The basic block of the SC and NA versions are identical other than the above.
- Very little has changed on/with the AJ133 SC over the years regardless of which Jag it has been used in - revised/improved timing chains. tensioners and guides and some revisions to some of the coolant pipes (alu to plastic with seams to plastic without seams)
- The SC has been the Eaton TVS R1900 throughout which in turn has had only two minor revisions - a different design of the problematic coupler / torsion isolator and a change from a vacuum operated bypass valve to an electronically operated one.
- All the variations in quoted power and torque figures over the years (eg PS / bhp of 450/475/510/550/575) are due solely to different PCM (ECU) tunes.

 

Along with the above they both have vvt on exhaust and inlet camshafts (previous aj's only had vvt on the inlet side) however the n/a gets cam phasing-vvt so essentially two direct profiles (one profile operates at lower rpm the other at higher rpm in sync with the inlet tubing within the manifold)

 

No, based on what little information I was able to find before this post, that doesn't seem quite correct. I mean, we already know about the tensioners revision, and as the other poster mentioned below, it seems there are a few other minor updates.

 

This is great information, thanks. A bit confused about your note on the NA version being discontinued in 2012 - it's in North America models through 2015 on the XK. Good correction on the compression ratios.

Based on the above, would a swap of an XKR-S GT engine or F-Type SVR engine into any of the other cars be a straight swap, then? I'm assuming for the XKR-S GT into a standard XK or XKR you'd need the factory tune and then adjust the tune for the different exhaust? Anything else you could think of it looking for? What about the F-Type into another one? I'm wondering if the electronics are the same, any differences in what the ECU is looking for, or if a standard XK chip could take the engine and then use an aftermarket tune like Velocity AP to unlock that higher stock power?

 

Ah, good to know. That's another mechanical difference then. Thanks for contributing.

 

I wasn't aware that the NA continued on in the XK until 2015 but that makes sense seeing as the XK continued on with a few things during the overlap with the F-Type (2013 to 2015) such as the ZF 6 speed auto vs the 8 speed.
The physical engine swap would be straightforward, the problems would be with the electronics eg PCM, TCM, heaps of modules etc etc and I'm not sure just how difficult these would be to overcome.

 

Should’ve clarified I reckon, other than the obvious difference of SC vs NA, it’s always been the same engine. The engineering adjustments I referred to included the timing chain revisions, the vacuum to electronic bypass valve, etc. I understood your question to be primarily focused on the differences between the XKR, R-S GT, SVR, F-type, etc to which my “no” reply would be accurate. Also the NA version was fitted to other JLR models.

 

The engine management system changed from Denso to Bosch in around 2013 on the XF, F Type, etc but stayed as Denso on the XK so if you are sourcing an engine from a different model you would have that to contend with.

 

The F-Type never used the Denso system, all F-Types have the Bosch system.

 

Well yes, I could have phrased what I put a little better but the F Type didn't come out until the 2013 MY so you might struggle to find an earlier one!

 

Good to know my 12 XKR has the same ECU as my 13 XKR-S. From Wraptor customs the Denso ECU allows some nice decel pops and snaps as long as you get an after market exhaust. I couldn’t hear crap before removing the resonators and getting a Spires exhaust - now I can.