GolfGTIforum.co.uk
Model specific boards => Golf mk7 => Golf mk7 GTD/TDI => Topic started by: GTDING on 01 April 2017, 12:05
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Looking at the VW website configurator for the facelifted GTD.
Noticed there are now TWO engine options. The GTD 2.0 TDI and the GTD 2.0 Blueline TDI.
The Blueline version is also .01 of a sec quicker to 0-62mph, 7.4sec, compared to the non Blueline time of 7.5sec.
So what on earth is the Blueline version of the GTD engine and why does it make a difference to performance?
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The Blueline version has 17" Curitiba wheels as opposed to the non-Blueline version that has 18" Sevilla wheels as standard, with two options for 19" Brescias or 19" Santiagos.
I'm assuming the 17" Curitiba wheels are lighter than the Sevillas (or optional Besicas or Santiagos), hence the 0.1 sec better acceleration time to 62mph.
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Blueline is a little tweak to overall spec which gives a slightly reduced CO2 rating, primarily for company car tax purposes/P11D purposes - makes the benefit in kind tax rates a little lower
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They think of everything at VW don't they!? :smiley: Thanks guys.
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The Blueline version has 17" Curitiba wheels as opposed to the non-Blueline version that has 18" Sevilla wheels as standard, with two options for 19" Brescias or 19" Santiagos.
I'm assuming the 17" Curitiba wheels are lighter than the Sevillas (or optional Besicas or Santiagos), hence the 0.1 sec better acceleration time to 62mph.
I understand that smaller diameter wheels equal faster acceleration; larger diameter wheels, higher top speed, slightly slower acceleration. I guess they must affect fuel economy too, as I think they quote different figures between the two versions for that too.
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The fleet market is so important to the big manufacturers that offering minor differences in specs/trims tailored to suit the market is going to be more and more common, even if some of the tweaks result in 'only' a couple of grams of CO2 savings in the (unrepresentative!) official tests
For reasons of tax and national insurance, my employer (a large FTSE100) has decided to stop offering access to any vehicles with over 75g/km CO2 on the company scheme from April 2017 onwards, which kinda rules out anything that isn't a plug in hybrid or full EV....so I'd expect most drivers that have taken something like the GTD previously will now be looking at the GTE instead
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The fleet market is so important to the big manufacturers that offering minor differences in specs/trims tailored to suit the market is going to be more and more common, even if some of the tweaks result in 'only' a couple of grams of CO2 savings in the (unrepresentative!) official tests
For reasons of tax and national insurance, my employer (a large FTSE100) has decided to stop offering access to any vehicles with over 75g/km CO2 on the company scheme from April 2017 onwards, which kinda rules out anything that isn't a plug in hybrid or full EV....so I'd expect most drivers that have taken something like the GTD previously will now be looking at the GTE instead
That takes the biscuit for sure! Just counting the pennies, as they do.
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I understand that smaller diameter wheels equal faster acceleration; larger diameter wheels, higher top speed, slightly slower acceleration. I guess they must affect fuel economy too, as I think they quote different figures between the two versions for that too.
Nope, the reason for the difference in acceleration is down to mass of the wheel/tyre combination...
The overall rolling circumference for the 17, 18 and 19 inch wheels will be, as close, as makes no difference.
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The fleet market is so important to the big manufacturers that offering minor differences in specs/trims tailored to suit the market is going to be more and more common, even if some of the tweaks result in 'only' a couple of grams of CO2 savings in the (unrepresentative!) official tests
For reasons of tax and national insurance, my employer (a large FTSE100) has decided to stop offering access to any vehicles with over 75g/km CO2 on the company scheme from April 2017 onwards, which kinda rules out anything that isn't a plug in hybrid or full EV....so I'd expect most drivers that have taken something like the GTD previously will now be looking at the GTE instead
That takes the biscuit for sure! Just counting the pennies, as they do.
Hundreds of thousands a year across the company fleet :shocked:
Kinda looking forward to a PHEV or BEV in a couple of years once the tech is a bit more mature
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I understand that smaller diameter wheels equal faster acceleration; larger diameter wheels, higher top speed, slightly slower acceleration. I guess they must affect fuel economy too, as I think they quote different figures between the two versions for that too.
Nope, the reason for the difference in acceleration is down to mass of the wheel/tyre combination...
The overall rolling circumference for the 17, 18 and 19 inch wheels will be, as close, as makes no
difference.
How much weight would they be saving over an 18inch?
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The CO2 is the same figure for both Blueline and standard at 125g/km... :huh:
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BTW I asked VW themselves about the difference and the difference IS only the 17's vs the 18's. Nothing else.
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In the current brochure, it states that the Blueline version are 6g (manual) and 7g (DGS) of CO2 less than the normal GTD versions respectively
(https://picload.org/image/rcgpcwci/screenshot2017-04-02at16.04.00.png)
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Yes, sorry, when I said the difference was only the wheels, its only the wheels which make the difference in CO2 emissions.
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How much weight would they be saving over an 18inch?
It could be significant depending on the wheel and tyre used. Also, the rim is, in reality, the heaviest part of the wheel when in motion and that mass is further from the centre of the wheel and therefore requires more power to accelerate at the same rate. This assumes that the wheels/tyres are the same width, of course...
There will be a number of elements that affect performance relating to the wheels but although the wheels are smaller the overall rolling circumference of 17/18/19 inch wheels will be the same (or as near as makes no difference) owing to the profile of the tyres used on each size... otherwise production would be a pain because each car would need to have the speedo adjusted for each wheel type...
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There was this test:
https://www.tirerack.com/wheels/tech/techpage.jsp?techid=108
The difference roughly on that test was 2% mpg going up from 17's to 18's.
CO2 figures are largely directly proportional to fuel consumption, would ~2% account for the difference? I think it might...
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18" & 17" rims have 225 wide tyres as standard fit, & have the same overall rolling circumference (as near as), so no difference in aero drag, grip etc.
Weight of alloy & tyre makes the difference, as less wasted energy to get up to speed (drivetrain loss)
I purchased a set of TD PR1.2 for summer in 17" with 225/45R17 which is the same spec as my OEM factory 17" Dijon's...
Each one was 2.2 to 2.5kg lighter than the OEM alloys... :cool:
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Yes, sorry, when I said the difference was only the wheels, its only the wheels which make the difference in CO2 emissions.
I've ordered the Blueline.
It's not just the wheels. It has an AdBlue tank included as well I believe.
The rest seems to be unconfirmed. For example it's been reported the DSG box on the Blueline is now a 7 speed (same as the GTI), whereas it was 6-speed before (http://www.greenmotor.co.uk/2017/04/vw-golf-gtd-facelift.html (http://www.greenmotor.co.uk/2017/04/vw-golf-gtd-facelift.html)).
So that combined with smaller "eco" tyres, is "supposed" to make the mpg marginally better, and "supposedly" less co2 emitted.
But some are claiming it doesn't really make a difference (the odd site says worse).
I'm on build week 19 (next week). So when i finally get my new car, I'll report back.