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06-29-2008, 05:34 AM | #2 |
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Hi Prateek..
I thought it wasnt as much as our cars were "detuned" but, the Oz cars are tuned for our petrol octane rating.. Maybe I am wrong..:iono: |
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06-29-2008, 05:52 AM | #3 |
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I thought we had higher octane petrol than the states. No doubt if we do have a detuned version it'll have something to do with a bizarre ADR.
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06-29-2008, 06:16 AM | #5 |
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06-29-2008, 07:32 AM | #7 |
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US cars are rated at 300hp. Typical US detune for the lower spec fuel.
Aust spec has same rating at Japanese cars, which have historical had the highest power due to their higher octane fuel. Aust is catching up :smile:
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06-29-2008, 10:04 AM | #8 |
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maybe i should have started by saying that US reviews seem to place the 0-60mph mark at 4.8 and the aussie versions consistently say 0-100kph at 5.3. my suspicion comes from the notion that surely it does not take half a second to gain those extra 3.44kphs! couple this with the factory claims that the us model is heavier as stock and has slightly more torque (though slightly less hp) at slightly higher RPM than ours. just wondered whether any of this is coming from some fundamental mechanical difference. :iono:
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06-29-2008, 09:28 PM | #11 |
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The only road test of the 135i I've seen in an Aussie car magazine was in MOTOR ... and those tests were done on a runway with a loose road surface which they described as "gravel" (0-100km/hr in 5.7s, 0-400m in 14.0s). I've not seen any Aussie tests on a decent surface. The 5.3s figure quoted is merely the BMW figure, which is conservative according to US and UK road tests.
BTW, don't belive the myth that the US has lower octane fuels than we do in Australia. The US use a different scale for octane rating than we do in Australia. We use RON (Research Octance Number) exclusively whereas they use MON (Motor Octane Number) in addition to RON. Depending on the composition of the fuel, the MON is typically about 8 to 10 points lower than the RON. Australia quotes RON whereas the US quote the average of RON and MON. This means that the octane in the US is about 4 to 5 points lower than the same fuel elsewhere, eg 87 octane fuel in the US, would be 91-92 in Australia.
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06-29-2008, 09:31 PM | #12 | |
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That our cars are detuned?? The dyno didnt suggest that they where detuned..:thumbup: |
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06-29-2008, 09:37 PM | #13 |
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Nope. According to the abovementioned MOTOR test, 2nd gear can run to between 110 and 120km/hr (true speed) at the engine cutout. MOTOR were pretty slow with the gear change though ... it added about 0.6s to the 110-120km/hr bracket (compared with 100-110 and 120-130).
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06-29-2008, 09:43 PM | #14 | |
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Careful with comparing dyno tests, especially between Australia and US. My understanding is that at-the-wheel dyno tests are really only useful for comparing before/after modifications ... not between different dynos or different countries / atmospheric conditions.
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06-29-2008, 11:53 PM | #17 |
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How come the Aussie car is lighter? wouldn't the electric seats etc which come standard make it heavier? And on another side note... isn't Australia now the most overweight country after recently overtaking our friends the Americans?
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06-30-2008, 01:24 AM | #19 | |
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Didn't someone say that here on the forum? |
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06-30-2008, 01:36 AM | #20 |
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On a simliar note, does anyone know why the 125i here is rated 10kW less than the 128i in the US? Same engine...
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06-30-2008, 01:58 AM | #21 | |
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The few Aussie reviews I've read have been with the manual and all have been over 5 sec. to 100km/h I've only ever seen the auto pull under 5 sec. to 100km/h... |
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06-30-2008, 02:11 AM | #22 |
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The 4.8 second time achieved by Road and Track was a manual. I was told (not sure how trustworthy) that all countries run the same ecu and program and that the car itself will adjust for the quality of fuel, not a specific program for each market. :iono:
http://www.roadandtrack.com/assets/d...508_RT_BMW.pdf
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