Times…0-100Km/h : 80-120Km/h… - Page 2

selespeed · 02-01-2003

<blockquote>quote:<hr />Originally posted by Gysman:
@selespeed: Hans, the 9.3 seconds that Alfa states, is for 100 real kilometers/hour, isnt it? When i try and accelerate as fast as i can, it reaches 100 km/h on the dials at around 10 seconds. (Sorry Mel, no accuracy). This works for me, but keep in mind that when driving the car at 100km/h on the dial, you're probably going +/- 93 real km/h.<hr /></blockquote>I know the dials are not correct, but if I can manage 9.0 sec on a wet road with wheels that kept spinning through the whole first gear, I think my bella is faster than the factory states (maybe because of the Novitec exhaust).

<blockquote>quote:<hr />Originally posted by Gysman:
I dont know if you noticed, but the car is slightly less economical than Alfa states... <hr /></blockquote>You can skip the word slightly, but I guess that does indeed depends on my driving style

Selespeed

02-01-2003

impossible to take any measure at the moment due to bad weather.

I can only say that I reach 235 km/h (at the speedo) and that my 147 is 12,5% faster than "from factory" on the 100-160 in V gear.

02-01-2003

Top speeds measured with the speedo aren't really interesting as far as I gather:

The speedo on the 147 has approx 4-6km/h deviation at 90km/h (mine has 4, i.e. it shows 90 when the actual speed is 86). This should mean it has about 8-10 km/h, maybe more at 180km/h. So really it doesn't say much. Also the tire sizes affect this, and at the speeds you guys are talking about that's starting to play a big part as well. Measure with a GPS or something like that, or it really doesn't say much. Try not getting the police to measure it for you though! (they can be very accurate I hear, hehhe)...

Anyone agree on this, or are you all just interested in 'imagining' your 147's breaking new speeed records as we go along????

THROTTLEMAN · 02-01-2003

Of course you are absolutely right Ulf! wink
Specially the part about the police measures... Ivo has the a word about that

wink

02-01-2003

i'd just like to say that i was reading a test of 145 2.0 QV in an italian car magazine and they were also testing the accuracy of the speedo. and at the top speed (around 213 km/h)there was a deviation of just some 2-3 km/h. so it was very accurate.

but yes it depends on the tyres and size of the wheels too.

but i don't think the measurements on the wet road from 0-100 can be accurate. because if the wheels are spinning the speed on the tacho will be greater and you can have 80 on the tacho in 2-3 seconds if the wheels are spinning but the car will be hradly moving eek!

BoNd · 02-01-2003

<blockquote>quote:<hr />Originally posted by axi:
[QB]i'd just like to say that i was reading a test of 145 2.0 QV in an italian car magazine and they were also testing the accuracy of the speedo. and at the top speed (around 213 km/h)there was a deviation of just some 2-3 km/h. so it was very accurate.
QB]<hr /></blockquote>In the tests made with the 147 by Auto-Motor und Sport, here in Greece, they have measured 92 km/h when the speedometer said 100 Km/h.

Mel Bonkers · 02-01-2003

<blockquote>quote:<hr />Originally posted by axi:

but i don't think the measurements on the wet road from 0-100 can be accurate. because if the wheels are spinning the speed on the tacho will be greater and you can have 80 on the tacho in 2-3 seconds if the wheels are spinning but the car will be hradly moving eek!

<hr /></blockquote>Axi,

I'm not sure if you're correct about this. Modern speedometers get their information from the gearbox and not from the wheels. You can have wheel spin and the rev counter going all the way into the red area, but the speedometer still would show the right speed. Or am I wrong on this?

Ant · 03-01-2003

<blockquote>quote:<hr />Originally posted by Mel Bonkers:
 <blockquote>quote:<hr />Originally posted by axi:

but i don't think the measurements on the wet road from 0-100 can be accurate. because if the wheels are spinning the speed on the tacho will be greater and you can have 80 on the tacho in 2-3 seconds if the wheels are spinning but the car will be hradly moving eek!

<hr /></blockquote>Axi,

I'm not sure if you're correct about this. Modern speedometers get their information from the gearbox and not from the wheels. You can have wheel spin and the rev counter going all the way into the red area, but the speedometer still would show the right speed. Or am I wrong on this?<hr /></blockquote>As far as I know, measuring the speed with the gearbox wouldn't solve anything, because everything is mechanicaly connected, thus it would mean that it doesn't matter where you measure it, it's going to be the same as on the wheels.

I think I'm right... I think...

Cheers,

Ant

03-01-2003

<blockquote>quote:<hr />Originally posted by Mel Bonkers:
 <blockquote>quote:<hr />Originally posted by axi:

but i don't think the measurements on the wet road from 0-100 can be accurate. because if the wheels are spinning the speed on the tacho will be greater and you can have 80 on the tacho in 2-3 seconds if the wheels are spinning but the car will be hradly moving eek!

<hr /></blockquote>Axi,

I'm not sure if you're correct about this. Modern speedometers get their information from the gearbox and not from the wheels. You can have wheel spin and the rev counter going all the way into the red area, but the speedometer still would show the right speed. Or am I wrong on this?<hr /></blockquote>well i know for mine 145 that the speedo shows let say 60 and i'm almost standing still and the wheels are spinning...but don't know if this is same with 147 as i'm no expert for speedometers wink

alfanutter · 03-01-2003

ok ok.. this is in the wrong section but i just had to join in

my 33P4 used to do 1/4 mile in 14.9 secs. with an exit speed of 102mph.in 4th (just)
the 0-62 (0-100kmh) was 6.8. top speed of 151mph(shown on spedo)
it had 167bhp with cams, chip, K&N and custom SS exhaust.

My current car will do 0-100kmh in 3.9 secs.
top speed of 169mph in 1.25miles standing start.
and i have no idea how long it takes to get from 80-120kmh in 4th as i am normaly still in second and 3rd!
there are too many mods to list.. but as standard the car is 227bhp and mine is 363bhp.

L.
(this is why i dont have an alfa atm )

Banflu · 03-01-2003

<blockquote>quote:<hr />Originally posted by Antonio Chico:
As far as I know, measuring the speed with the gearbox wouldn't solve anything, because everything is mechanicaly connected, thus it would mean that it doesn't matter where you measure it, it's going to be the same as on the wheels.

I think I'm right... I think...

Cheers,

Ant<hr /></blockquote>you are Ant wink

only way to get the real speed is GPS or the sort
must admit though, i've never experienced this speedo movement with the car stopped wink

selespeed · 03-01-2003

<blockquote>quote:<hr />Originally posted by axi:
but i don't think the measurements on the wet road from 0-100 can be accurate. because if the wheels are spinning the speed on the tacho will be greater and you can have 80 on the tacho in 2-3 seconds if the wheels are spinning but the car will be hradly moving eek!

<hr /></blockquote>Axi,

The wheels were not spinning when I reached 100 km/h which means the 9,0 secs I mentioned are correct to reach 100 km/h on the dial. I know that 100 km/h on the dial is not actually 100 km/h, but IMHO I think I can reach an actual speed of 100 km/h (appr. 105/106 on the speedo) in 9,0 secs when the road is dry.

Selespeed

03-01-2003

147 speedo is very accurate at top speed !
A magazine has measured (don't remember which one, perhaps "Auto-Motor und Sport")only a 5 km/h difference at top speed with stock 17'alloys...

03-01-2003

That doesn't make sense to me if it's 5km/h wrong at 90, how it cuold be the same at 200 (or 235 as some of you guys seem to think, heheheh).... Anyway, it can't be considered an accurate measurement for our cars even if some magazine tested on a completely different car?

Mel Bonkers · 03-01-2003

Guys, guys, guys!

With all due respect, but the journalists in car reviews do use the speedometer for doing the acceleration test don't they. And with all respect, but I don't have NASA-equipment attached to my car to make EXACT 0-100 measurements.....you know. I use the speedometer.....because what else is it good for?

See what I mean? Let's not start the real/unreal kilometers/speedometers discussion al over again. Let's just enjoy our cars and post some times over here, despite they are measured using the speedometer.......

Anybody care to disagree http://www.alfaowner.com/forum/ubb/icons/icon16.gif No? Thought so.....

Sorry guys.....had to do this

Drive safely!

03-01-2003

I don't care for real/unreal, the speed i feel is the speed i'm at, and the speedo helps me avoid tickets... Just think it's silly if someonee really thinks their car is 20-30 km/h faster than factory spec without mods, ebcause it doesn't make much sense (though I agree it would be nice if it was true!). I know several car magazines that use proper equipment for measuring 0-100 though, not the speedo. wink

03-01-2003

<blockquote>quote:<hr />Originally posted by Ivo:
Just found out my SatNav system gives also a speed, based on GPS sats & corrected with the speedpulse signal

It's approx. 5 km/h lower when doing 120 km/h on the dash.

Sounds very reasonable ....

It also can display G forces to all sides. It was a bit more then $ 190,= though

wink <hr /></blockquote>Satnav shows speed?? eek!

Where can I find this Ivo?!

Speedo in the satnav??

eek!
Sounds interesting Ivo!

How can I find this (in the Nav+)?

And you're right Mel