Interesting tow cars

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JLv3.0
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Re: Interesting tow cars

Post by JLv3.0 »

On the rather shaky premise that a Defender and a old-shape Wrangler are probably equally well assembled and have similarly advanced mechanicals (i.e. not at all and prehistoric) think more like 50% loss - yes really. A mate of mine ran a workshop modifying Wranglers and the 200 bhp crank figure was more like 100 bhp at the wheels on the dyno.
V8Granite
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Re: Interesting tow cars

Post by V8Granite »

There is a towing channel on YouTube where they tow 6 horse horse boxes and other such big stuff. It’s amazing how much some of the dually equipped trucks can tow in America. If you are doing 40mph full throttle in a 450hp diesel pick-up, it seems a bit too portly to me :lol:

Towing with a 5th wheel must feel completely different though.

Dave!
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Re: Interesting tow cars

Post by V8Granite »

JLv3.0 wrote: Thu Sep 26, 2019 9:33 am On the rather shaky premise that a Defender and a old-shape Wrangler are probably equally well assembled and have similarly advanced mechanicals (i.e. not at all and prehistoric) think more like 50% loss - yes really. A mate of mine ran a workshop modifying Wranglers and the 200 bhp crank figure was more like 100 bhp at the wheels on the dyno.
I’ve read a 33% measured loss for a V8 petrol with the same gearboxes as mine but I don’t know what axles it had, probably standard Rover axles.

I’m intrigued now so I’ll find a graph from somewhere.

The Humvee went from 230hp to less than 100ho at the tyres.

Dave!
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16vCento
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Re: Interesting tow cars

Post by 16vCento »

What about an XC90 V8, I believe a certain member of this establishment used to have one.

Not sure if Mr Yu still has his or not, would probably make light work of a car trailer and sound quite nice whilst doing so.
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Sundayjumper
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Re: Interesting tow cars

Post by Sundayjumper »

V8Granite wrote: Thu Sep 26, 2019 7:46 am I’d say that the drivetrain loss is very optimistic, I think closer to 30% is more likely.

Mine has hit a GPS verifies 86mph but that’s on the governor in top, maybe I had an extra couple of mph with different gearing but not much.
Changing the drivetrain loss to 30% I get 88mph as theoretical top speed. For comparison, plugging in numbers for the Touareg, I get 141mph vs. VW's quoted figure of 144mph. So that part of the calc all feels about right within a couple of percent.
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Re: Interesting tow cars

Post by V8Granite »

That seems far more likely speed wise.

Dave!
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Foz
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Re: Interesting tow cars

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Sundayjumper
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Re: Interesting tow cars

Post by Sundayjumper »

Foz wrote: Thu Sep 26, 2019 5:31 pm
:mrgreen:
I can't believe I didn't think of that. It's on my list.

https://www.pistonheads.com/features/ph ... roes/37039

They also did the Touareg with the W12 for a while, but only LHD sadly.
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JonMad
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Re: Interesting tow cars

Post by JonMad »

NIce, from someone looking at the SQ7 recently.

As per one of the PH comments on that link, what about https://www.autotrader.co.uk/classified ... 9051899048 with a towbar?
Left over crest; tightens.
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Foz
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Re: Interesting tow cars

Post by Foz »

Sundayjumper wrote: Thu Sep 26, 2019 5:40 pm
Foz wrote: Thu Sep 26, 2019 5:31 pm
:mrgreen:
I can't believe I didn't think of that. It's on my list.

https://www.pistonheads.com/features/ph ... roes/37039

They also did the Touareg with the W12 for a while, but only LHD sadly.
738ft/lb, that’s ridiculous!
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JonMad
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Re: Interesting tow cars

Post by JonMad »

https://www.autotrader.co.uk/classified ... 4197153774
or
https://www.autotrader.co.uk/classified ... 9202456899
for £8.5k less from the same dealer, with only the 240bhp and 400lb ft to push you along.

Actually, that's almost exactly half the power of the V12 :lol:
Left over crest; tightens.
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Re: Interesting tow cars

Post by Nathan »

JLv3.0 wrote: Thu Sep 26, 2019 9:33 am On the rather shaky premise that a Defender and a old-shape Wrangler are probably equally well assembled and have similarly advanced mechanicals (i.e. not at all and prehistoric) think more like 50% loss - yes really. A mate of mine ran a workshop modifying Wranglers and the 200 bhp crank figure was more like 100 bhp at the wheels on the dyno.
I could believe that.

I remember being a Wrangler 4.0, made a lot of noise on kickdown but didn't really move.
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dinny_g
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Re: Interesting tow cars

Post by dinny_g »

Foz wrote: Thu Sep 26, 2019 5:31 pm
:mrgreen:
Wasn’t there a fundamental flaw with the V12 Tdi’s though - 5000 mile service intervals or 2 miles per gallon or summat. IIRC it was little more than a marketing exercise off the back of Le Mans success... R8 first then these???
JLv3.0 wrote: Thu Jun 21, 2018 4:26 pm I say this rarely Dave, but listen to Dinny because he's right.
Rich B wrote: Thu Jun 02, 2022 1:57 pm but Dinny was right…
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nuttinnew
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Re: Interesting tow cars

Post by nuttinnew »

JonMad wrote: Thu Sep 26, 2019 9:11 pm https://www.autotrader.co.uk/classified ... 4197153774
or
https://www.autotrader.co.uk/classified ... 9202456899
for £8.5k less from the same dealer, with only the 240bhp and 400lb ft to push you along.

Actually, that's almost exactly half the power of the V12 :lol:


Well, the V12 is just two A4 engines cellotaped together.


If rarity (potential costs/aggro) puts you off the V12 but the V6 doesn't have enough oomph, how about this?


https://www.autotrader.co.uk/classified ... 500&page=3
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Jobbo
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Re: Interesting tow cars

Post by Jobbo »

If you want a silly engined VAG and a V8 is too small but a V12 is too big, and a normal V10 is not enough, how about a Touareg R50 https://www.autotrader.co.uk/classified ... 8080942023

Frankly the Q7 V8 TDI is far more appealing though, and I don't like Q7s. Back to the Allroad BiTDI for me.
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Re: Interesting tow cars

Post by Nathan »

Jobbo wrote: Fri Sep 27, 2019 9:05 am If you want a silly engined VAG and a V8 is too small but a V12 is too big, and a normal V10 is not enough, how about a Touareg R50 https://www.autotrader.co.uk/classified ... 8080942023

Frankly the Q7 V8 TDI is far more appealing though, and I don't like Q7s. Back to the Allroad BiTDI for me.
Would that 2015 Q7 have the Porsche Diesel engine by any chance ?
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Jobbo
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Re: Interesting tow cars

Post by Jobbo »

Nathan wrote: Fri Sep 27, 2019 9:42 am
Jobbo wrote: Fri Sep 27, 2019 9:05 am If you want a silly engined VAG and a V8 is too small but a V12 is too big, and a normal V10 is not enough, how about a Touareg R50 https://www.autotrader.co.uk/classified ... 8080942023

Frankly the Q7 V8 TDI is far more appealing though, and I don't like Q7s. Back to the Allroad BiTDI for me.
Would that 2015 Q7 have the Porsche Diesel engine by any chance ?
I have no idea - I didn't even realise they kept making a V8 TDI that late. This Autocar article from 2009 (when the Q7 was facelifted) says the 4.2 got a power increase, so it may simply be that they kept fitting the same slightly tweaked Audi engine from 2009-2016: https://www.autocar.co.uk/car-review/au ... -v8-tdi-se

ETA: Porsche used the Audi engine anyway, not sure how they modified it themselves so it's possible Porsche's mods made it into the Audi version I guess...
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JonMad
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Re: Interesting tow cars

Post by JonMad »

Looks quite subtle compared to a Q7...
https://www.autotrader.co.uk/classified ... 3296420415
Left over crest; tightens.
V8Granite
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Re: Interesting tow cars

Post by V8Granite »

Panamera V8 tdi was supposed to be quite special. There was an owner on readers cars in Pistonheads.

Dave!
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Foz
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Re: Interesting tow cars

Post by Foz »

When did the current panamera appear, 2016 was it?
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