Peak power: 115bhp @ 5400rpm

BHP = 115

RPM = 5400

TORQUE = t

a) BHP = (t x 5400)/5252

BHP x 5252 = t x 5400

c) (BHPx5252)/5400 = t

c2) (115x5252)/5400 = t

TORQUE = 111.84ft/lb @ max hp

Ah' date=' but there is a big doubt about the accuracy of VAG's weight figures... this has been done to death, but the top and bottom is its fairly unlikely that it really weighs that much, its probably closer to 1250...

For example, on the Seat site it has the TDI Cupra down as being LIGHTER than the 1.8T, and that cant be true can it...

And 1200 kg whichever way you package it up certainly isn't light [/quote']

Another reason why I suggest to look up the spanish site, they have measured the correct weight of the cars and have tested A LOT of new cars so it's quite a good database. Giving all this information in easy to access form like this is something auto magazines do rarely, thus one of my favourite sites at the moment.. babelfish will help if you have trouble reading (not spanish myself either)..

Anyway, the reason why (turbo) diesel cars feel fast is that thanks to turbo charging they get immense torque very quickly and thus you get higher bhp at low revs than you'd get with petrol car. If you are both in gear it will take time for the guy with petrol car to drop gear and catch up. At the same time turbo diesel cars drop in torque fairly quickly at higher revs so the steep power rise stops and you don't get that much more at higher revs. So no, it's not more powerful if the petrol driver keeps his revs up when changing. Anyway the thing that counts the most is how much bhp you have and at how wide rpm band it is. A turbo petrol car is even better in this sense as thanks to engine charasteristics you can keep high boost and thus torque by much wider power band. 1.8t engine for example.

and mil, the reason you car get's lower bhp is that the max torque is delivered fairly early for a na petrol car, thus making it more like a "torque engine", in a NA petrol world anyway..

edit: heres the link once more if someone is interested: http://www.motor.terra.es

to help navigating: select "pruebas" at left menu then select car from right hand pull down menu. On the article click "nuestros datos" to get measured car data.

the thing is mil your car doesn't produce he max bhp/torque constantly, thts what a power graph shows, so at 6200 your car isn't producing your max torque figure but only 111lbft like the man worked out above

Peak torque: 125lbft @ 2400rpm

Just for closure, peak torque on the 2.0 is only 57bhp @ 2400rpm

I hate Literal Equations. :thumbdwn:

What???? Now I'm getting very confused.

And on 5th gear going max speed I'm at about 5,800rpm, not 5,400rpm.

I'm confused.

Damn it.

Whatever. My car is quick. Period. and I'm happy with it. Period.

:grumpy:

Btw, has anyone got a dyno graph for 2.0 8v engine? I have lots for tdi engines but haven't seen any for this one.. Isn't it the same engine that's used in a lot of VAG cars so the data should be available? Tried a quick google but with little usable as result.

And on 5th gear going max speed I'm at about 5,800rpm, not 5,400rpm.

But that might not be when the engine is putting out it's maximum amount of power...

Any chance you could get your car on a rolling road and get a dyno output? If you then scan it in and post it up it will be more telling...

Rob.

What???? Now I'm getting very confused.

And on 5th gear going max speed I'm at about 5' date='800rpm, not 5,400rpm.

I'm confused.[/quote']

Your bhp figure for the 2.0l is MAX bhp, and the torque will be MAX torque, in 5th gear at 5,800rpm you are not using your max engine torque. if you were at 2400rpm (in any gear) you'll be using the mamimum torque, but your engine would only be putting out 57bhp. And at 5400rpm (in any gear) your enginbe would be giving you your maximum bhp but only 112lb/ft of your torque which is 13lb/ft less than your max.

In any event, they are only numbers, and its performance in the real world that counts. And as it's been said, there isn't too much in it in real world situations.

Damn it.

Whatever. My car is quick. Period. and I'm happy with it. Period.

:grumpy:

It may very well be, no way knowing that until proven otherwise, people just like to be skeptic, just see my previous posts about 1.4 tdi performance.. remember the data the guy posted was pure theory from factory specs. Have you dyno'd your car btw it would be more informative if not 100% accurate one could at least see the shape of the power curve produced..

I wish I could get it dyno'd but the only company with a dyno (believe it or not, only one company with a dyno apparently) is a pr*** from Australia who won't dyno my car for some funny reason.

Bottom line is that each of us bought our cars because we like them. No amount of argueing is going to change that.

Also, both vRS and 2.0petrol Fabias are quick cars, perhaps not as quick as (whatever someone compares against) but quick nevertheless. Also, as Autocar's Anglesey track times show, the difference between a proper sports car and a Fabia can be under a second with the same driver. Between two cars with virtually any performance difference it's mostly down to the driver.

It makes me laugh that people spend thousands making their cars 20% quicker, yet virtually none spend

Let's clarify some basics here. To accelerate a mass, you need a force. You get a force on the road which is the torque at each wheel divided by its radius. So that overcomes the inertia of the car. Now, once you start moving, you have resistance - e.g. wind resistance. It requires power to maintain a speed against this resistance, whether you are accelerating or not. Therefore, in general, your acceleration will depend on both torque and power - progressively more on power as your speed builds up.

Therefore, in general, your acceleration will depend on both torque and power - progressively more on power as your speed builds up.

Good point Mike

I'll take a pretty accurate stab at the true level-road top speed of a 2.0 Fabia as 125mph max. (With up to 10% speedo error on top)

On the Bruntingthorpe straight, from a standing start, I've had my top speed radar-ed like this:-

- Audi A4 quattro diesel 179bhp / 285lb/ft - 136mph (Std Official mph 136)

- Impreza AWD Turbo 242bhp / 245lb/ft - 138mph (Std official mph 143)

Both cars were remapped so had been rolling-roaded, and both cars were measured with a radar gun in similar wind and temperature conditions.

SO, 63bhp more gave 2mph more, or , 40lb/ft more gave 2mph less !

Rob

Only one post regarding Fabia vRS RR figures and I cant believe i'm having to say this again but look at the JBS RR day and NO FABIA VRS GENERATED MORE THAN 1-2 BHP EITHER WAY OF 130 BHP.

I do have a video of my remapped vRS in action on the speedo if anyone is interested.

Ok, well that sounds interesting. Would be glad to hear more results from other cars also if their dyno is that accurate. Or maybe it was just a warm day? I mean temperature plays an important role esp. with turbo cars so that could explain that some people getting better results time to time? I've noticed that sometimes if I do a lot of runs my times start to get a little worse if I don't let the intercooler cool off. On cool mornings the car also feels faster.

Btw, unless you have video of a standard fabia vRS then I guess there is no point posting it in this thread as it is not about modified cars.

NO FABIA VRS GENERATED MORE THAN 1-2 BHP EITHER WAY OF 130 BHP[/b'].

:agree:

Chris

Ok, must admit the results are pretty much spot on, checked the other thread so not going to argue more. Makes you wonder how many false dyno results are flying around there. Or then they all have dynod the cars 5am when the sun is not up RR accuracy also plays a big role, clearly JBS have a very accurate RR that takes into account a lot of things. Can't confirm this however as I live in another country

Would like to see them dyno a 1.4 tdi as I still don't believe that it's just 75bhp.

Would like to see them dyno a 1.4 tdi as I still don't believe that it's just 75bhp.

I'm sure we could arrange a Briskoda shoot-out

Chris

Yeah, surely there are also people from UK with this engine, even seen couple on this forum I'm going to dyno mine on local RR here in Finland that should be quite reliable, before/after when I get my powerbox (decided to go that route as those have given fairly good results on this engine plus the reason I can sell the box since I may have to change for bigger car again soon)..

I do have a video of my remapped vRS in action on the speedo if anyone is interested.

Yes please! Link Please!!

Good point Mike

I'll take a pretty accurate stab at the true level-road top speed of a 2.0 Fabia as 125mph max. (With up to 10% speedo error on top)

Rob

I've found out something...had a little chat with the service manager at my dealership...

Speedo 'error' is deliberately included by all car manufacturers, of which 3% is minimum and 6% is max, not 10%. As of Skoda cars, the speedo 'error' is implemented is 4%.

Mil

Many people have worked out speedo error on their cars from their GPS devices and also from the gear ratios of the car, so know the actual speedo error. This varies from car to car and make to make. At 145mph indicated, my Octavia was doing a true 134.

I'm a 2.0 fan as you know, but let's be honest here - the true, level road, no wind maximum speed is no more than 125mph. Downhill or with a favourable wind maybe, but a 2.0 is not a 137mph (or 132/3mph) car. Sorry.

It's good fun all the same.

Rob

I've found out something...had a little chat with the service manager at my dealership...

Speedo 'error' is deliberately included by all car manufacturers' date=' of which 3% is minimum and 6% is max, not 10%. As of Skoda cars, the speedo 'error' is implemented is 4%.[/quote']

You just can't give a definate figure like that. Some manufacturers tyres have slightly different diameter to other manufaturers, the difference in diameter between a new tyre and an old tyre can be as much as 8mm. Then there is a difference for tyre pressure. The new Octy's tyre pressure warning system works by checking the difference in wheel rotation between the four tyres. Even if you have two identicle Skoda's if one was fitted with new tyres at 34psi and the other with worn tyres at 28psi the the speedo's on each car would differ by as much as 6%.

At a true 70mph GPS my Octy's speedo curently reads 75mph.

Cheers

Lee

But even GPS isn't 100% accurate

Chris