raftrey
Member Since: 29 Oct 2006
Location: wigan
Posts: 59
  
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I know that the discs are bigger on the V8 but are the pads the same?
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 24th Jun 2008 9:28 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26702
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PM Nick, (The Large One), he is parts manager at Yeovil Land Rover, and offers discount to forum members 
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| 24th Jun 2008 10:02 pm |
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simonsi
Member Since: 14 Oct 2007
Location: Auckland
Posts: 1264
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Calipers and pads are the same on both, discs and caliper mounting brackets are different to accomodate the slightly bigger discs.
Same on the rear, petrol variants have bigger discs and different brackets, same pads and calipers. Cheers
Simon
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| 24th Jun 2008 10:08 pm |
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raftrey
Member Since: 29 Oct 2006
Location: wigan
Posts: 59
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Thank you.
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| 25th Jun 2008 4:21 pm |
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Andrew van den Heever
Member Since: 09 Jun 2007
Location: Cape Town
Posts: 340
  
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Why is this? V8 and HSE need bigger brakes. 
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| 26th Jun 2008 12:48 pm |
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simonsi
Member Since: 14 Oct 2007
Location: Auckland
Posts: 1264
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300HP in the V8 can put more energy in than 190HP in the TDV6 so needs bigger brakes to extract that potential brake heat out again.
S/C and TDV8 RRS go bigger still on the fronts with the Brembo fit although 2007MY RRS HSEs had the Brembos as std even on the TDV6 in order to rationalise/commonise parts fir on the prod line. Cheers
Simon
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| 26th Jun 2008 1:42 pm |
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Desert Traveller
Member Since: 06 Aug 2006
Location: The Gabba - QLD
Posts: 420
 
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Brakes have nothing to do with engine size or power output. They are sized based on vehicle mass and the maximum speed potential. 06 TDV6 SE with many LR and after-market extras. Used only on weekends and trips out west.
Audi TT Roadster (Daily and around town drive)
VW Eos TDI For Sale
Previously 01 TD5 and 94 TDI
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| 27th Jun 2008 12:35 am |
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Andrew van den Heever
Member Since: 09 Jun 2007
Location: Cape Town
Posts: 340
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My thoughts exactly desert traveller. Stopping the vehicle is weight and speed dependant. It doesn't matter how fast I get to 120kph in my V8, if you are doing 120kph in your TDV6 we are both about 2,7 tons and we both need to stop in the same way. So.... why do I get bigger brakes? I think it is great but it limits my rim size and therefore tyre options.
Just seems weird, like a higher spec item that makes no sense. Its like giving an HSE better air bags than an S 
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| 27th Jun 2008 8:46 am |
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simonsi
Member Since: 14 Oct 2007
Location: Auckland
Posts: 1264
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Desert Traveller wrote:Brakes have nothing to do with engine size or power output. They are sized based on vehicle mass and the maximum speed potential.
Exactly! And on any given stretch of road the max speed potential with the V8 is greater than the TDV6. The kinetic energy to dissipate is given by 1/2MV^2 so a small increase in speed, because it is squared, means much more energy hence bigger brakes required. Cheers
Simon
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| 27th Jun 2008 9:04 am |
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simonsi
Member Since: 14 Oct 2007
Location: Auckland
Posts: 1264
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Andrew van den Heever wrote:My thoughts exactly desert traveller. Stopping the vehicle is weight and speed dependant. It doesn't matter how fast I get to 120kph in my V8, if you are doing 120kph in your TDV6 we are both about 2,7 tons and we both need to stop in the same way. So.... why do I get bigger brakes? I think it is great but it limits my rim size and therefore tyre options.
Just seems weird, like a higher spec item that makes no sense. Its like giving an HSE better air bags than an S
As above, real world driving isn't a single stop from a single speed. Put a V8 and a TDV6 on a track and the V8 will lap faster as its average speed is higher, this equates to more energy per minute to dissipate via the brakes, hence it needs bigger brakes.
Agreed a single stop from 120kph requires the same brakes in both cases, the issue is that you can get back to 120kph faster in the V8 and do it again, Hence over time the V8 brakes have to work harder. Simple energy conservation theory. Cheers
Simon
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| 27th Jun 2008 9:07 am |
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Andrew van den Heever
Member Since: 09 Jun 2007
Location: Cape Town
Posts: 340
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Simonsi.
Thanks for the reply. Makes sense to me that repeated braking situations would require bigger brakes, so the V8 needs the extra heat dissapation.
But, why does the TDV6 HSE have bigger brakes than an S or SE?
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| 27th Jun 2008 9:13 am |
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simonsi
Member Since: 14 Oct 2007
Location: Auckland
Posts: 1264
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AFAIK in the UK at least it doesn't. The RRS (Range Rover Sport) HSE does but only because the Brembo brakes come as part of an options package that was integrated into the std spec for the HSE trim level in the 07 Model Year - nothing to do with braking requirements per se.
The two non-braking requirements I can think of for fitting larger brakes would be parts standardisation and marketing so either of these could account for bigger brakes coming with a trim level rather than a physical brake requirement (as, on the whole, bigger brakes than actually required are not a bad thing) Cheers
Simon
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| 27th Jun 2008 9:23 am |
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al cope
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10297
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got to be some reasons for stiffing you for all that extra cash a HSE costs
Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD
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| 27th Jun 2008 9:23 am |
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Andrew van den Heever
Member Since: 09 Jun 2007
Location: Cape Town
Posts: 340
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Thanks Simonsi.
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| 27th Jun 2008 9:30 am |
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