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Diesel vs Petrol FR - Which is quickest?

BanziBarn

FR TDI & Type-R
Jun 5, 2003
358
0
Greater London
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I know that performance is down to power to weight so the petrol is obviously going to be faster but I am surprised about the the 'In gear' numbers. Normally, when people compare petrol and diesel the derv accelerates quicker in gear.

I suppose though that the gearing is different? 3rd in the petrol isn't the same and 3rd in the petrol meaning that at a speed where you might be in 4th in the petrol you might be in 3rd in the diesel?

It would be interesting to see performance figures measured using revs. For example, 30 to 70 from 2000rpm in one gear (which ever one that is). I might be talking rubbish here by the way, I'm just thinking off the top of my head!
 

flakmunky

Olympic Knitting Champion
Aug 23, 2005
652
0
Marmitehampton
Interesting discussion folks, nice to see no flaming going on :p

It is interesting and something I thought and read a lot about after going from a Golf 20.GTTDI to a 350Z and, as I said earlier, I wasn't as impressed as I thought I would be in the Z's performance. The conclusions I drew were the kick wasn't there because the torque / power was delivered over a much wider rev range...

Someone eralier mentioned that they drove the TDI and the TFSI on the Seat track day with 4 people in the car and didn't notice much difference... That will be down to the torque in the TDI with a fully laden car, I would think!

Flaming doesn't get you anywhere! [:@]
 

Dan Cupra R

The Yellow Sub
May 2, 2006
1,514
0
Reading
I love these petrol vs diesel threads:D Keeps me amused at work.

You buy a diesel if your tight with money.

You buy a petrol if the above doesnt apply;)

*Runs off into the distance with stirring pot *:cartman:
 

LeonGTI

Back to the green pump...
Jan 16, 2008
74
0
Warwickshire
was driving to work this morning ~ 0645 and it was pretty chilly and my car felt rapido (Leon Ref Sport TDI 140). Maybe it was the cold dense air being better for combustion etc.... but was massively chuffed. (and over 40 mpg too!)

If the FR TDI is quicker than that then I will be pretty happy!!!
 

Dan Cupra R

The Yellow Sub
May 2, 2006
1,514
0
Reading
It would be a bit quicker in the cold as cold air is denser.

Diesels are pretty rapid to be fair. On a rolling road day i attended last year somebody had an Ibiza Cupra Diesel (the new shape) and we had a little blast down the duel carriageway.

The cupra diesel pretty much matched my accerlaeration but the longer revs on my petrol ment I could pull away.

Still, for a diesel it was pretty impressive
 

flakmunky

Olympic Knitting Champion
Aug 23, 2005
652
0
Marmitehampton
@Dan - I think you have summed it up there. Diesels are getting better all the time and are v. quick... Shame Gordy has twigged that more diesels are being sold and they go further on the same amount of fuel so he has to put the tax up to get the same revenue come the day we are all driving diesels.

Anyway, now to light the match:

I think all TDIs should have a sticker in the rear window saying:

"I Love Tractors"

hehehehehe

I looked everywhere for a sticker saying that when I used to drive a Peugeot 309 diesel. Now if that car doesn't get me flamed, nothing will! ;)
 
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DandB

My other car
Jul 20, 2007
160
0
London
was driving to work this morning ~ 0645 and it was pretty chilly and my car felt rapido (Leon Ref Sport TDI 140). Maybe it was the cold dense air being better for combustion etc.... but was massively chuffed. (and over 40 mpg too!)

If the FR TDI is quicker than that then I will be pretty happy!!!

My car felt very quick as usual this morning but with 20mpg i'll be visiting the petrol station later :doh:
 
Jul 10, 2007
1,267
0
Leeds
@Dan - I think you have summed it up there. Diesels are getting better all the time and are v. quick... Shame Gordy has twigged that more diesels are being sold and they go further on the same amount of fuel so he has to put the tax up to get the same revenue come the day we are all driving diesels.

I've noticed that the price of Diesel just keeps creeping upwards. Round here it is a couple of pence more than V-Power, just for standard diesel...

So about 6 pence a litre more than standard unleaded...
 

LeonGTI

Back to the green pump...
Jan 16, 2008
74
0
Warwickshire
Diesel is getting so expensive to buy but does do about twice the mpg during brisk driving compared to that of the petrol. 6p doesn't sound a lot when it delivers 200 miles more range on a tank... :)
 

flakmunky

Olympic Knitting Champion
Aug 23, 2005
652
0
Marmitehampton
I remember when derv was considerably cheaper than petrol... and that was 4* petrol as well!

Ol' Gordy knows a good thing when he sees it!

Anyway, with the FTSE in free-fall none of us will be able to afford fuel soon, anyway. Get your biscuit tins out from under the matresses!
 

chrisboyle999

MFD3 for sale, inbox me.
Nov 28, 2006
1,838
0
Geordieland
The arrival of £5 a gallon diesel​

Another reason to go TFSI​

When petrol prices hit the £1 a litre mark last year motorists and hauliers were understandably outraged. However, the price of diesel went through the £1 a litre mark a long time ago, and has showed no sign of falling since. The national average price diesel currently stands at 109.3p per litre, less than 1p away from £5 a gallon. This time last year these pump prices were unthinkable, but today 43% of petrol stations nationwide are selling at, or above, £5 a gallon - we are fast approaching an era where this is the norm. How has this happened?

As little as 10 years ago, diesel and unleaded petrol were the same price – 63.3p per litre. Thanks to a combination of inflation, exorbitant tax and rising world oil prices, we can only dream of the days when fuel was that cheap, but it raises an important question – why is diesel more expensive than petrol today? Also, in the majority of European countries diesel is cheaper than petrol, so why do UK motorists have to pay more?


Diesel cars became popular in the 1970s thanks to their economical and environmental benefits, but with diesel headed towards £5 a gallon, perhaps diesel users will be forced to rethink the switch, and consider whether or not they really are saving money. 10 years ago a diesel car doing an average of 40mpg, driving 9000 miles a year, would have cost £647.55 to run. Today the cost is a whopping £1125 – leaving a typical diesel motorist £477.45 out of pocket per year, compared to 10 years ago.

For haulage companies, who use much more fuel, the continually rising diesel prices leave them with an even bigger financial gap to bridge. Many are left with no choice but to pass the extra costs on to their customers, so as the price of diesel goes up, the cost of transporting food and other essential goods goes up too. Any further increases in the price of diesel could trigger the end of cheap food in the UK.

For once, government tax is not to blame for making diesel more expensive than petrol. Both types of fuel are subject to a fixed rate duty of around 50p per litre, plus another 17.5% VAT on top of the price of the fuel and the duty added together. Although it explains why the government collects extra tax from motorists when the price of oil forces increases at the pump, it doesn't help to explain why diesel is more expensive than petrol.

There are two main explanations for high diesel prices, aside from instability in the oil markets. Firstly, diesel prices in particular often peak over the winter because it is very similar to the fuel used in a lot of British central heating systems. As demand goes up, the oil companies can charge more, and the cost gets passed down the supply chain, to drivers. This happens every year, but with an extra 983,000 diesel cars sold in the UK's in 2007 alone, relying on diesel to oil our infrastructure could leave us in a very vulnerable position.

The second reason is only exacerbated by our dual reliance on diesel. The UK used to get a lot of its diesel from refineries in the Gulf of Mexico, but as production has slowed, the demand for the available diesel has shot up. In short, there is less diesel available from the UK's traditional supplies to fuel more cars and more central heating systems than ever before. Could this be a taste of what is to come when the last drop of oil finally dries up?

The government can't be held responsible for supply and demand in the energy markets, but they do have the power to ease the financial burden on those who use diesel by cutting tax on fuel. We rely on diesel lorries to transport essential goods around the country, and the world, so surely a tax cut for diesel vehicles would be good for the economy? Tax on both petrol and diesel in the UK is extortionate, and as world markets change it becomes clear that policies that might have made economic sense 10 years ago are in desperate need of an overhaul.

We allowed petrol prices to break through the £1 a litre barrier, and they have continued to rise ever since. The arrival of £5 a gallon diesel should be ringing alarm bells for motorists, but instead of standing up and using our democratic power to force Gordon Brown to address the situation, we close our eyes at the pumps and blindly hand over our credit cards. And if this cowardly behaviour continues we'll be approaching £6 a gallon before we know it.
 

flakmunky

Olympic Knitting Champion
Aug 23, 2005
652
0
Marmitehampton
Well Chris, I always thought it was successive greedy Chancellors that caused the rise in diesel prices.

Still, I blame Gordy as he looks like a git.
 

Dan Cupra R

The Yellow Sub
May 2, 2006
1,514
0
Reading
With most people switching to diesels these days the government has to find a way of getting their money. Diesels are driving longer than their petrol cousins thus, not filling up as much.

By putting up prices of diesel it compensates the fact your driving longer between filling.

Thieving [:@][:@]
 

Holbourn

Guest
Petrol & Diesel are cheap..... i just paid £20 for a cartridge for my printer and thats probably got 0.00001 of a litre of ink in it....

From your example it could be argued that:


Printer equates to the car.
The cartridge equates to the engine with the fuel.

In which case the cost comparison is not quite so stark!

I do agree the cost of a cartridge is outrageous - but of course one of the reasons for this is that the manufacturers subsidise the cost of the printer from the profits made on the cartridge. This has led to some ridiculous situations. One company recently offered printers, including cartridges and delivery, at less than the cost of the cartridges it contained. However, this soon stopped when people started ordering ten or more printers each!
 
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GREY 225

Jim R
Oct 15, 2006
445
0
With most people switching to diesels these days the government has to find a way of getting their money. Diesels are driving longer than their petrol cousins thus, not filling up as much.

By putting up prices of diesel it compensates the fact your driving longer between filling.

Thieving [:@][:@]

Thieving :censored: government have to get there pay rise and perks from somewere.fuel will continue to rise,you watch it will be another 2p added on duty at next budget.It the easy way for them to get funds.
 

Fl@pper

Back older greyer and less oilier but always hope
Jun 19, 2001
12,368
25
Gloucester
With most people switching to diesels these days the government has to find a way of getting their money. Diesels are driving longer than their petrol cousins thus, not filling up as much.
By putting up prices of diesel it compensates the fact your driving longer between filling.
dont forget that making diesel takes more of the crude oil to make whereas petrol leaves byproducts that can be used elsewhere

technically speaking diesel should cost more than petrol - its dearer to make

you think it's dear now ? you watch it get worse
 
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