No one seems to know to even have any guess as to what is the reason for keeping these engine types around...so I'm just throwing it out there

 

Not entirely sure what your asking but if its any consolation AMG has replaced that engine with a 6.2 litre NA engine that makes ~ the same HP.

 

Thats the question...because AMG hasn't and left the 55 around..as you can see in the picture...

 

One makes more torque and is probably easier to get more hp out of than the other?

 

Makes sense....

 

I guess, however, since the 6.2 is out...why not just tune that to meet your specs?

 

But I'm pretty sure I read somewhere the the 5.5 SC will be eventually phased out. These things take time. Keep in mind that AMG engines are hand built.

The SL and G are also older platforms may may not suit the new 6.2L.

 

but to offer 2? how is that a good management decision?

 

I'm not a big believer in AMG engines. They are just not reliable. Fantastic when they work ... but as in all hand-built engines, they require frequent maintenance. (re: Ferrari) My bro's C32 AMG was a piece of crap. That 'charger was not reliable and was extremely thirsty on gas. Never again.

And going back to your original question ... it really doesn't make any sense to have a 5.5 and a 6.2 ... but maybe they have orders for the 5.5 they need to complete before they phase it out.

 

The 6.2 makes ~475lb-ft vs the 5.5's 516ish. Not easy to tune in another 40+ lb-ft.

 

I understand that point, in fact I think you're giving me the benefit of the doubt, because I think its more like 50+ lb-ft., but, nonetheless not impossible to dial in that amount of torque, and why have 20% of your line up not updated? If every model designation carries an AMG with a 6.2 except 2, why not streamline the board, even if the issue is torque?

So I'd have to agree here:

 

The new E63 is also an older platform, but they managed to squeeze it in there.

I thought it was 6.3L, not 6.2L...

 

Like I mentioned earlier, it could be a capacity issue. Its possible they simply can't make enough 6.2L engines for all the AMG products. Its also possible, although doubtful that the 6.2 simply doesn't fit or fit right in those vehicles. Any idea what trannies those two cars are using? I'm doubtful its the new 7 speed which is I think the only tranny the 6.2 works with.

I wondered forever why the GM was still using the 3.4L V6 in the Equinox, Torrent and Rendezvous when they had a far more powerful and efficient 3.5L. It was capacity reason's. They simply couldn't make enough 3.5's at the time and switching the factory that made 3.4's to making 3.5's was too costly. Or so I read somewhere.

 

Its marketed as a 6.3 but technically its a 6.2. I should be calling it a 6.3 though.

Displacement 6,208 cc (383 cu in)
Bore/stroke 102.2/94.6 mm
Compression ratio 11.3 : 1
Output 510 bhp at 6,800 rpm
Max. torque 465 lb-ft at 5,200 rpm

And its 465 lb-ft not 475 like I mentioned earlier.

 

Rather, they should be calling it a 62.