Official BMW M3 M4 Specs: 430HP, 369+ LB-FT, Under 3306 Pounds, Bi-Turbo Inline 6 Cyl

[Needsdecaf]

Originally Posted by ixse

go read the other post.. says 175lb lighter than E9x. so there you go.

Exactly.

No matter what the number, it's 80 kilos lighter than a SIMILARLY EQUIPPED E9X. Larger car, lighter weight - good.

[b0bab0i]

Originally Posted by ixse

go read the other post.. says 175lb lighter than E9x. so there you go.

E9X M3 is 3700lb. It will still be a porker at 3525.

[Savory]

Interesting move to smaller turbines. I'm guessing part of it is to eliminate lag, but here's to hoping that more reliable boost can be extracted from it. The auto rev match 6MT is a tad gimmicky, but no doubt functional.

[Stronie]

Shit now I need to trade mine.

Truth of the matter is they always are on the cutting edge of tech. This car will be much better then previous.

[flinchy]

Originally Posted by Jason

Two relatively small Mitsubishi turbos providing up to 18.9 PSI.

that's... very vague

the N54 also has mitsubishi turbos, two TD03's... judging by the size, the S55 will have twin TD04's (google TD03 vs TD04, it looks exactly the same)

AND if it IS in fact a TD04, there's the chance of the similar-to-N54 hybrid turbo upgrades with TD05 internals, which means relatively cheap mods, and a tune (when it's worked out) to the same relative level as the N54, should easily get it into the 6xx whp range! (stock turbos, you'd expect what.. high 5xx at least with supporting mods?)

AND, it'll breathe SIGNIFICANTLY higher in the rev range (though nothing too nuts of course).. and more than likely be very happy over 20psi.

man this car is going to be AWESOME to see in the months after release

[flinchy]

Originally Posted by b0bab0i

E9X M3 is 3700lb. It will still be a porker at 3525.

E9x is 3550 without a driver, fully loaded fluids and all.

evidence can be found all oveer the net.

[flinchy]

Originally Posted by sy2767

Guess the n55 is not such a bad platform after all..........

never anything wrong with it.. just harder to tune, more complex, smaller turbo stock etc.

[GregW / Oregon]

Originally Posted by b0bab0i

E9X M3 is 3700lb. It will still be a porker at 3525.

1/4 ton less than an RS5!

[Smiley913]

If it's only 80 kg lighter compared to the e92, I wonder how much of that weight saving is due to the smaller engine?

[elitex]

oh man. I thought I was going to keep my M3 a little longer. hmm 911 or the new M4? decisions decisions.

[caneaddict]

Originally Posted by Judah

Ok, someone save me a headache. Is the weight less than 3306 lbs or is the weight 3500 lbs ?

Jason says its 3300 with 90% fuel yet others on this forum keep stating 3500.

Please explain...

The discrepancy has to do with the various measurement standards and an attempt to compare apples to apples.

US Curb weight is measured with the base car (without any cost options that would reduce weight) plus driver and cargo (165 lbs) and 16 gal fuel (6 lb/gal) That's the way most manufacturers quote weight on their web site including BMW.

EU has 2 measurements:
Unladen - car has all fluids, running gear, spare tire etc. 90% fuel tank and no driver or cargo.
EU kerb - unladen plus 68kg driver and 7kg cargo (165 lbs)

The other difference between US and Euro is that usually a base US car already has more options than a Euro base car so the weight will account for those options. An example would be if the M4 comes with an auto standard and manual as a no cost option then the weight will be quoted for the auto.

BMW's quote of 3306 lbs is without driver/cargo with a euro spec. Hence the US weight will be at least 3471 lbs. However as i said the US number is usually a bit higher for standard equipment so US should be at least 3480 lbs (it might be in the low 35xx if DCT is included in the calculation). Those estimates line up well with BMW's claim that the M4 will be 80kg lighter than a similarly equipped e90. In the US, BMW quoted the e90 at 3704 lbs which is where everyone is getting the 3528 lb number.

These are all estimates but it looks like it will come in somewhere between 3480 - 3540 pounds when using the same measurement that you currently see on BMW's web site for all their other US cars.

Hope this was helpful

[caneaddict]

Originally Posted by flinchy

E9x is 3550 without a driver, fully loaded fluids and all.

evidence can be found all oveer the net.

That is exactly why the listed weight is 3704 lbs. The listed weight accounts 165 lbs for driver and cargo.

[Judah]

Originally Posted by caneaddict

The discrepancy has to do with the various measurement standards and an attempt to compare apples to apples.

US Curb weight is measured with the base car (without any cost options that would reduce weight) plus driver and cargo (165 lbs) and 16 gal fuel (6 lb/gal) That's the way most manufacturers quote weight on their web site including BMW.

EU has 2 measurements:
Unladen - car has all fluids, running gear, spare tire etc. 90% fuel tank and no driver or cargo.
EU kerb - unladen plus 68kg driver and 7kg cargo (165 lbs)

The other difference between US and Euro is that usually a base US car already has more options than a Euro base car so the weight will account for those options. An example would be if the M4 comes with an auto standard and manual as a no cost option then the weight will be quoted for the auto.

BMW's quote of 3306 lbs is without driver/cargo with a euro spec. Hence the US weight will be at least 3471 lbs. However as i said the US number is usually a bit higher for standard equipment so US should be at least 3480 lbs (it might be in the low 35xx if DCT is included in the calculation). Those estimates line up well with BMW's claim that the M4 will be 80kg lighter than a similarly equipped e90. In the US, BMW quoted the e90 at 3704 lbs which is where everyone is getting the 3528 lb number.

These are all estimates but it looks like it will come in somewhere between 3480 - 3520 pounds when using the same measurement that you currently see on BMW's web site for all their other US cars.

Hope this was helpful

Very helpful, thanx for taking the time...

[Bowser330]

I think the stock boost on the 335i is something around 10psi which is where the turbos are most efficient(BMW stock setting), they have been tuned to output 19psi but they don't do that very efficiently and heat and stress can be an issue.

Therefore my feeling is that if the S55's turbos operate at 19psi most efficiently (BMW stock setting)then there is room for tuning to higher than stock pressure to that inefficient area of boost pressure.

Said another way, I doubt BMW would make the S55 with turbos that are running inefficiently at factory/stock boost pressure.

[brisance]

That piston crown design looks interesting. Any numbers for the static compression ratio?

[GregW / Oregon]

Originally Posted by Smiley913

i wonder how much of that weight saving is due to the smaller engine?

It was posted earlier; not much - 20-some lbs. Source: http://f80.bimmerpost.com/forums/sho...d.php?t=893216

[F80NJM3]

Thanks for info. Something to look forward too. I'm assuming this will eliminate the $1300 gas guzzler tax??

[hellrotm]

Originally Posted by Judah

Ok, someone save me a headache. Is the weight less than 3306 lbs or is the weight 3500 lbs ?

Jason says its 3300 with 90% fuel yet others on this forum keep stating 3500.

Please explain...

Just going by what was stated in the press release. 80kg less than out going E92 M3, in which BMW had listed unladen weight on BMW US site at 3704 lbs. So 3704 lbs - 176 lbs = 3,528 lbs

But many E92 owners have put their cars on scales and have gotten a little over 3,500 lbs. So if the M4 is indeed 176 lbs lighter, then 3,303 figure does sound about correct.

[imserious]

Wow...

I can't believe people are still nitpicking. This car is going to be a beast and looks like it will deliver on the things that matter.

Interested to see how well some of the tricks like auto blip and exhaust flap work in real life.

With all the carbon fiber how much is this thing going to cost? I guess that's the next big announcement.

[pbw]

Awesome, spec looks amazing. Sets a new benchmark, plus a new price band! Circa £60k for UK me thinks!

[autopal]

I was hoping for a little more torque thou, at least 400 ft lbs. Bearing in mind that torque was the main problem of the last M3, the just released Alpina B3 has 443 ft lbs, and its a given that the next C63 AMG will have well over 450 ft llbs.

[pkimM3r]

Just had an epiphany. Must stop using m3post at work to make enough bread to get this in a couple years. Starts tomorrow. Ill keep it to my phone lol.