05-07-2020, 09:52 AM | #1 |
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Comparing 330i and M340i at high speed?
Featured on BIMMERPOST.com Any other differences at high speeds between the two? Note: include only info at high speeds, I know the low end torque is better on m340i. |
05-07-2020, 11:03 AM | #2 | |
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05-07-2020, 03:25 PM | #3 |
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Great point, didnt think of that really. Overtaking on the highway is not to be looked down at.
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05-07-2020, 04:41 PM | #4 |
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I agree about the passing power. But the 330i has more than enough passing power at highway speeds and is faster than 90pc of the cars on the highway, at least where I live at in IL. The M340i has way too much power considering highway speeds and speed limits. Obviously it's also the better car.
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05-07-2020, 07:10 PM | #5 | |
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05-07-2020, 07:12 PM | #6 |
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Ah yes. I missed that part. Idk why I assumed he was in Canada. My bad
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05-07-2020, 07:47 PM | #7 |
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The limit is 110km/h but many including me do not follow what limit says, its normal.
So if I understand this right, overtaking at speeds above 100 km/h is a big difference? |
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05-07-2020, 07:49 PM | #8 |
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Yes it's dramatic.
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05-08-2020, 04:55 AM | #9 |
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i've never driven the new 330i.
but my last 2 cars were a f30 328i and a b9 a4. 180kph is what 111mph. At 110mph a 2.0 turbo car would feel like it was running out of gas, and going much faster than 115-120 was going to take a lot of road and it felt like the cars were giving it all they had haven't driven my m340i at that speed yet, but it just feels like i'ts barely even trying at 100mph, so I would guess it just feels like it has so much more left to give at much higher speeds. |
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05-08-2020, 11:50 PM | #10 |
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If you floor the M340 at 100 miles per hour the car pushes you back in your seat.
If you floor a 330 at 100 the engine coughs. Honestly the M340 is silly fast, and has ridiculous reserves of power even well beyond 100 mph. |
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05-09-2020, 07:49 AM | #11 | |
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I've not performed same experiment on the 340i, and no doubt there's a huge difference. 125+ additional horsepower is a substantial amount! |
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05-09-2020, 09:16 AM | #12 | |
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I've owned three M3's. Two F series M3's. The M340 is substantially faster than those cars, while being infinitely smoother and more refined. |
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05-09-2020, 10:29 AM | #13 |
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Passing power comparo is simple, when you make some assumptions:
assumption 1: same air resistance, assumption 2: same transmission, when you take the ZF8HP this will not be too far off and presume it has sufficient gears to keep the car around the rpm region of peak power, assumption 3: same driveline losses, seen for high speed passing, you don't need AWD and can ignore the extra losses. Facts from the specification sheets: Power ratio (Europe) is 374/258 or the M340i has 45% more power. M340i weights 12% more than 330i With these assumptions you can simply use F=m.a or a=F/m and mass is 12% higher and F is 45% higher so the extra acceleration is about 30% better. So in overtake requiring 10s in the 330i will require 7.7s in the M340i. |
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05-09-2020, 08:37 PM | #14 | |
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As some of you said that above ca 170kmh the m340i might feel lightly only trying while the 330i might feel it is already hard work, do you think it is because Bmw has already squeezed the B48 engine to get the maxiumum out of it while they under-limited the power of the B58 as it could give more than what is stated? |
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05-09-2020, 09:10 PM | #15 |
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M340i is significantly faster. I had a 330i tried to keep up and I lost him in comfort mode like he was standing still. You can hit 130 plus just by burying your foot in comfort mode.
Happen to me once while merging from on-ramp onto highway and all this occurred in mere seconds. As a result, driving this car requires you watch your speed at all times. It also does those speeds without much fanfare. Sport plus is even more insane, which is why I sometimes ponder why some folks needs tunes.
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05-09-2020, 09:36 PM | #16 | |
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05-09-2020, 09:46 PM | #17 | |
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05-09-2020, 10:14 PM | #18 | |
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05-09-2020, 10:38 PM | #19 | |
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05-09-2020, 11:40 PM | #20 |
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Yup. If you go WOT even in eco pro, car revs till the redline and is fast. It's when you're not going WOT that the difference is felt.
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05-10-2020, 02:46 AM | #21 |
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M340 is like a f80 m car (haters gonna hate for that) but it's that quick compared to 330. So composed, great feedback and decent pep. Yeah. It's awesome.
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05-10-2020, 03:44 AM | #22 | |
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The B48 is, in the F39, F40 and F44, in the MX35i models that come with 306hp. The difference between those 2 engines is a letter, the one that BMW uses to know in which range its engine is. B48B20O1 B48B20T1 |
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