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MERCEDES W126 The W126 S Class saloon and coupe from 1979-1992 (260SE, 280S, 280SE, 280SEL, 300SD, 300SDL, 300SE, 300SEL, 350SD, 350SDL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SE, 560SEL, 560SEC)

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  #16  
Old 16th June 2020, 01:38 PM
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Default Re: 420SEL vs 560SEL

You have to compare apples with apples. The Oz & Euro versions of both cars were very different. Yet the Oz cars seem more desirable here despite the fact we got very few options, far less power & rubbish diff ratios. Unless they’re full of rust, a grey import is a no brainer for me!!
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  #17  
Old 16th June 2020, 02:20 PM
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Default Re: 420SEL vs 560SEL

Quote:
Originally Posted by Oversize View Post
You have to compare apples with apples. The Oz & Euro versions of both cars were very different. Yet the Oz cars seem more desirable here despite the fact we got very few options, far less power & rubbish diff ratios. Unless they’re full of rust, a grey import is a no brainer for me!!
yes, exactly, better to compare AU 6.9 with AU 560 and high comp 6.9 with ECE 560.

I did a quick comparison on automobile-catalog.com which has all the specs. I used the USA versions as they are very similar to the Australian ones. I also compared the non ECE european 560.

A few things jumped out:

1) W126 is a huge improvement in aerodynamics. 0.4CD vs 0.33 that translates to a Drag area of 0.875m2 on the W116 to 0.703m2 on the w126
2) W116 is 150kg heavier.
3) W126 has four gears, but they are spaced differently so the other factors are more important.


The Specs:

Power:
6.9 US: 187KW / 488Nm
6.9 EU: 210Kw / 550Nm
560 US: 178KW (AU is 180) / 389Nm
560 EU: 205KW / 430Nm
560 ECE: 220KW / 455 Nm

Power to weight:
6.9 US: 93.3 watt/kg
6.9 EU: 108.5 watt/kg
560 US: 97 watt/kg
560 EU: 112 watt/kg
560 ECE: 121.8 watt.kg

0-100km / 160km / 200km
6.9 US: 8.9s / 22.3 / 45
6.9 EU: 7.2s / 18 / 34.6
560 US: 8.1s / 21.7 / 43.7
560 EU: 7.2s / 17.7 / 33
560 ECE: 6.7s / 16.6 / 30.8

so what we get if we run a 1/4 mile drag race:
The US 6.9 and 560 are almost identical in performance. At the end of the race, the 560 is 8m ahead, but actually travelling slightly slower (138km/h vs 141km/h)

The standard european 560 with cat and the european 6.9 are similar too
again, only 8m difference at the end of the race (560 ahead), and almost identical speed, the 6.9 going 149km/h and the 560 148km/h

The ECE 560 is significantly faster, it is now 22meters ahead of the 6.9 and traveling at 151km/h.

These differences are small enough, that if you lined up and Australian 6.9 and an Australian 560 in a race, the one with the engine in the best shape would win. Same for a european 560. The ECE engines are another level of performanance again. Owning an Australian 560 and an ECE 560, the ECE is faster to rev and has more urgency. The Australian car likes to cruise more.
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Last edited by c107; 16th June 2020 at 02:22 PM.
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  #18  
Old 17th June 2020, 01:57 PM
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Default Re: 420SEL vs 560SEL

Those torque figures are particularly impressive and I would imagine the oil stays very filtered with those 4 oil filters!
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  #19  
Old 17th June 2020, 03:20 PM
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Default Re: 420SEL vs 560SEL

Since this thread was about the 420SEL vs the 560SEL, I did another comparison to see the performance difference.# I also included the 300SE as these were basically the 3 W126 models of the second generation you could choose from in Australia (300SEL and 420SE are not common).#

Curb Weight:#
300SE: 1520kg
420SEL: 1740kg
560SEL: 1830kg

Power:#
300SE: 132kW / 255Nm
420SEL: 150kW / 309Nm
560SEL: 178kW / 389Nm#

Power to weight:
300SE 86.8 watt/Kg
420SEL: 86.2 watt/kg
560SEL: 97 watt/kg

Rear End:
300SE: 3.46:1
420SEL: 2.47:1
560SEL: 2.47:1

0-100km/h / 0-160 / 0-200
300SE: 9.5 / 25.3 / 57.1
420SEL: 9.4 / 26 / 63.9
560SEL: 8.1 / 21.7 / 43.7

If we run the drag race again:#The really tall ratio of the 420 means that the 300SE beats it by 14m and 4s, with the 560 15m ahead of the 300.# At the Quarter mile mark, the 300 is doing 136km/h, the 420 131km/h and the 560 138km/h.#

This to me illustrates that the rear end ratio of the emissions 420 is too tall.# #They should have used the 2.82 pr 2.88 gearsets.# # I also prefer the 2.65 in the 560 that the european models got.##
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  #20  
Old 17th June 2020, 07:55 PM
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Default Re: 420SEL vs 560SEL

Sorry Bryce.

All posts deleted.

Last edited by Patrick_R; 18th June 2020 at 07:36 AM.
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  #21  
Old 18th June 2020, 10:54 AM
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Default Re: 420SEL vs 560SEL

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Originally Posted by Patrick_R View Post
Sorry Bryce.

All posts deleted.
No worries - you may want to put it in a new thread. It was really interesting info.
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  #22  
Old 18th June 2020, 11:02 AM
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Default Re: 420SEL vs 560SEL

No worries
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