Prospective 981 GT4 Owners Discussion Forum.

[mrdemon]

Lightningman said:

I was under the impression the GTS has 340bhp and the 991 Carrera 345. Please feel free to elucidate as to where I have made a mistake.

not that it matters, just a facts thing but the 911 has 350BHp

[J-P]

mrdemon said:

Lightningman said:

I was under the impression the GTS has 340bhp and the 991 Carrera 345. Please feel free to elucidate as to where I have made a mistake.

not that it matters, just a facts thing but the 911 has 350BHp

Nope - 991 Carrera has 350HP, which translates to about 345Bhp - happy to help

[fioran0]

mrdemon said:

not that it matters, just a facts thing but the 911 has 350BHp

350PS, 345HP, 257kW on the 3.4 991 Carrera engine.

[mrdemon]

fioran0 said:

350PS, 345HP, 257kW on the 3.4 991 Carrera engine.

PS, HP, BHP, Porsche UK don't state PS they quote HP at 350, so not the 345HP as quoted.

so some thing is wrong as the CGTS is stated as 340HP which is correct but the 911 350HP

[m33ufo]

Hmmmm....it's now obvious why we're on page 34 of this topic with perhaps 2 pages of anything relevant.

[fioran0]

1kW is equal to 1.36PS (being DIN or metric HP) which is equal to 1.34HP
Thus 257kW is 349.52PS or 344.38HP

I'm not responsible for the accuracy of Porsches marketing blurb with regards to their misuse of units, but since they list kW and this is an SI unit, its quite clear what the rated power output is.

[J-P]

PS = Pferdestärke (horse strength in German)
HP = PS
PS = 0.986BHP

So Lightningman's comment was in fact correct, Mr D - it's you that needs to re-do your maths

[mrdemon]

I am quoting Porsche UK web site, one is listed as 340HP the other is 350HP

if you cannot get the info from Porsche UK where can you get it ? If Porsche is wrong, what hope does any one have.

[J-P]

mrdemon said:

I am quoting Porsche UK web site, one is listed as 340HP the other is 350HP

if you cannot get the info from Porsche UK where can you get it ? If Porsche is wrong, what hope does any one have.

Porsche website is not wrong - they are qutoing 350HP, which is the same as 350PS, however 350HP is actually 345BHP, which is what Lightning Man said. i.e. he quoted BHP not HP for 991 Carrera, which is correct.

[mrdemon]

ok that means the GTS is wrong, you guys cannot have it both ways :-)

You quote 340BHP but the site show 340HP, so that's really 335Bhp :-p

[fioran0]

mrdemon said:

ok that means the GTS is wrong, you guys cannot have it both ways :-)

You quote 340BHP but the site show 340HP, so that's really 335Bhp :-p

250kW = 340PS = 335HP

[fioran0]

J-P said:

PS = Pferdestärke (horse strength in German)
HP = PS
PS = 0.986BHP

Watch out, BHP is something else altogether.

SAE HP is an international format that expresses work based on imperial units, PS is a DIN format that expresses work based on metric units. This is why the two are close but not the same when converted from an original kW value. Watts are of course the prime unit in which to express work being an internationally and clearly defined S.I. unit.

If one was to use HP to (incorrectly) reference PS then it would need to have the term (DIN) included to prevent confusion.

[mrdemon]

J-P said:

Porsche website is not wrong - they are qutoing 350HP, which is the same as 350PS, however 350HP is actually 345BHP, which is what Lightning Man said. i.e. he quoted BHP not HP for 991 Carrera, which is correct.

who is wrong then Porsche or Lighting man, now I have posted both specs of cars ?

one HAS to be WRONG ...

[NIgt3]

haha Mrd proved wrong, brilliant!!

[J-P]

fioran0 said:

J-P said:

PS = Pferdestärke (horse strength in German)
HP = PS
PS = 0.986BHP

Watch out, BHP is something else altogether.

SAE HP is an international format that expresses work based on imperial units, PS is a DIN format that expresses work based on metric units. This is why the two are close but not the same when converted from an original kW value. Watts are of course the prime unit in which to express work being an internationally and clearly defined S.I. unit.

If one was to use HP to (incorrectly) reference PS then it would need to have the term (DIN) included to prevent confusion.

Thanks, Neil - that's worth knowing. What is BHP then, as it's this figure that I've always seen as something slightly different to HP or PS (which are pretty much always quoted as identically equal).

[J-P]

mrdemon said:

ok that means the GTS is wrong, you guys cannot have it both ways :-)

You quote 340BHP but the site show 340HP, so that's really 335Bhp :-p

Yep, the GTS quote is wrong it has 335BHP.

[mrdemon]

SO, after a full page of wrongness, My quote was in fact right that lightingman is wrong :-p

good that's sorted... and I am in fact right.....

[J-P]

mrdemon said:

J-P said:

Porsche website is not wrong - they are qutoing 350HP, which is the same as 350PS, however 350HP is actually 345BHP, which is what Lightning Man said. i.e. he quoted BHP not HP for 991 Carrera, which is correct.

who is wrong then Porsche or Lighting man, now I have posted both specs of cars ?

one HAS to be WRONG ...

The GTS BHP figure on Lightning Man's post is wrong - Porsche do quote DIN next to their HP figures (you have to look at the back of their brochures to find it).

[J-P]

mrdemon said:

SO, after a full page of wrongness, My quote was in fact right that lightingman is wrong :-p

good that's sorted... and I am in fact right.....

Nope because you actually quoted his 991 figure as incorrect so sadly (for you), you were wrong - his 991 figure was spot on

[mrdemon]

J-P said:

Nope because you actually quoted his 991 figure as incorrect so sadly (for you), you were wrong - his 991 figure was spot on

I was misled thinking I might be wrong, when in fact my quote of "I would redo your maths :-) " was correct all along. lol

thinking others might be right was my mistake. as this line was VERY convincing "Please feel free to elucidate as to where I have made a mistake."

well I consider lightingman now corrected and we have all learnt some thing :-)
I have learnt if people use posh words I don't understand (being a dumb ass) like "elucidate" then that does not mean they are right :-p

Edited by mrdemon on Monday 15th December 13:25