RE: Driven: BMW 125i M Sport
Discussion
E38Ross said:
StottyZr said:
E38Ross said:
StottyZr said:
Peak torque from 1350-4800rpm with peak HP coming in@5000rpm 
It may as well be a diesel!
turbo petrol gives similar curve shape to turbo diesel shock. the petrol will obviously rev higher but you seem to be comparing NA petrol to turbo diesel. the new turbo petrols give a huge band of torque; why i never understand why people say low down torque of diesel; in reality they mean the low down grunt of a turbocharged engine. It may as well be a diesel!also - the peak torque band on the petrol is far wider than with a diesel, find a diesel car producing peak torque all the way up to 4800rpm!!
Thats a mapped 123d
430nm@2000rpm, it still has 430nm@4400 with peak HP holding on until 4600 where he seemingly backs off. This is with a car@272hp, if the car was tuned for economy and running ~220hp it would be much easier to prolong the torque all the way untill 5000rpm.So yes, it might as well be a diesel!
i bet you could map the 125i to make peak torque higher if you liked.
E38Ross said:
StottyZr said:
U asked me to show you a diesel producing peak torque all the way up to 4800rpm. I wasn't exactly a million miles away.
i should have said production car and standard....you could argue you might as well have got the petrol 
StottyZr said:
E38Ross said:
StottyZr said:
E38Ross said:
StottyZr said:
Peak torque from 1350-4800rpm with peak HP coming in@5000rpm It may as well be a diesel!
turbo petrol gives similar curve shape to turbo diesel shock. the petrol will obviously rev higher but you seem to be comparing NA petrol to turbo diesel. the new turbo petrols give a huge band of torque; why i never understand why people say low down torque of diesel; in reality they mean the low down grunt of a turbocharged engine. It may as well be a diesel!also - the peak torque band on the petrol is far wider than with a diesel, find a diesel car producing peak torque all the way up to 4800rpm!!
Thats a mapped 123d
430nm@2000rpm, it still has 430nm@4400 with peak HP holding on until 4600 where he seemingly backs off. This is with a car@272hp, if the car was tuned for economy and running ~220hp it would be much easier to prolong the torque all the way untill 5000rpm.So yes, it might as well be a diesel!
i bet you could map the 125i to make peak torque higher if you liked.
I now have a 328i with the same engine as this 125i albeiet with a bit more power. There is no comparison, it infinitly more free revving and that alone makes it feel much better as an engine, the torque is so low you can not even detect its turbo charged (with the exception of it chirruping away under the bonnet.) and it loves to rev. It is one of, if not the best 4 cylinder engine I have ever driven. The power is usable right down from the low 1krpms right up to 7k.
The 123d was usuable from about 2krpm, and if you were off throttle above 3.5-4krpm there was a large ammount of lag as the large turbo spools up.
I would love to give the new 125d ago though, the peak torque on that is down to 1500rpm and peak power is 5000rpm, that should be VERY impressive.
But having said that I am still not sure I would take it over the petrol.
In my 123d Coupe I used to average 38mpg, and in my 328i I am averaging 30.3mpg, with petrol being cheaper and the 328i being in a whole other league of performance, I think petrols are becoming a viable everyday driver option again.
But having said that I am still not sure I would take it over the petrol.
In my 123d Coupe I used to average 38mpg, and in my 328i I am averaging 30.3mpg, with petrol being cheaper and the 328i being in a whole other league of performance, I think petrols are becoming a viable everyday driver option again.
If its trying to be all things to all men (40+ mpg, easy to drive torque curve, lifeless steering, respectable turn of pace, yooful bodykit) it ends up just being 'decent' in most areas and outstanding in none. Thats always the impression I was left with from Golf GTI reviews. (Except of course for Top Tw@ where even the MK4 gti somehow wins the group test against far superior machinery)
Shirly something like a 330d is a better proposition for that sort of pace, economy and prestige.
Shirly something like a 330d is a better proposition for that sort of pace, economy and prestige.
Edited by KM666 on Wednesday 4th July 17:26
1440kg! I know every other manufacturer makes each new version of a model bigger and brings in new smaller models when they no longer have a small car in the name of progress, but this is hugely large and heavy and surely BMW have run out of numbers? The 0-series just doesn't sound good.
According to Parkers, an E46 325i sport coupe is 1430kg, 214bhp and 39mpg. If I was in the market for such stats with a propeller on the bonnet then I would have one of them instead.
According to Parkers, an E46 325i sport coupe is 1430kg, 214bhp and 39mpg. If I was in the market for such stats with a propeller on the bonnet then I would have one of them instead.
I agree with you Stotty, that power delivery is clearly mapped in and I should think it will benefit from a remap. I suppose it all depends on how much is left in the turbo.
Given how low the torque comes in it probably isn't much but it'll be interesting to see how it fares.
It's only 20hp shy of the 2012 328i. I wonder how different the engines are.
Given how low the torque comes in it probably isn't much but it'll be interesting to see how it fares.
It's only 20hp shy of the 2012 328i. I wonder how different the engines are.
Edited by Marf on Wednesday 4th July 19:16
chris182 said:
1440kg! I know every other manufacturer makes each new version of a model bigger and brings in new smaller models when they no longer have a small car in the name of progress, but this is hugely large and heavy and surely BMW have run out of numbers? The 0-series just doesn't sound good.
According to Parkers, an E46 325i sport coupe is 1430kg, 214bhp and 39mpg. If I was in the market for such stats with a propeller on the bonnet then I would have one of them instead.
Its 1420KG (1440 is for the auto) according to the BMW website (Unladen (EU)) versus 1348KG for a 5 door GTI (after subtracting the 75KG VW add for the driver).According to Parkers, an E46 325i sport coupe is 1430kg, 214bhp and 39mpg. If I was in the market for such stats with a propeller on the bonnet then I would have one of them instead.
Mitch2.0 said:
A lot of Parkers figures are out, 39mpg from the M54B25 is a joke unless you're on a downhill section of motorway.
Best I have had out our 325 is 40mpg at a cruise speed of 72mph and an average speed of 68mph on a run from south Wales to Kent. It was quiet, pretty traffic free run as you can see in the small difference between cruise and average. Last weekend we did a run from Kent up to Northumberland on the A1, cruise at 75mph, average 65mph and 36mpg.
Neither was using hyper-miling and both included higher overtaking speeds, though I was driving smoothly as I had my 88 yr old MiL and her dog onboard. The car is also an auto.
Always been quite impressed that the BMW is one of the few cars that can achieve its rated mpg without using extreme economy techniques.
New Scot said:
nickfrog said:
Only problem is that a M135i is only £1500 more (and 100+ hp more and 2 cylinders more) if you spec the M125i with leather, xenons and M-SPORT brakes(factory 4-pot calipers), which are all standard on the M135i and makes it a performance bargain IMO. It almost looks decent in 3-door too.
Wasn't this done to death on the previous thread - "135i v Golf GTi"? More interesting was/is comparison between 125i and 125d ... And don't mention my mate's Dad's chipped 335d again, Shirley!Gassing Station | General Gassing | Top of Page | What's New | My Stuff