Latest BMW M4 Coupe F82 Spy Pics and Updated Info (Nearly 8000 RPM)

[ATX78703]

Originally Posted by Remonster

If they're making 420 horsepower at 8,000RPM then torque will be at 275lb/ft at redline. 420 horsepower at 7,500RPM translates to about 295lb/ft at that same RPM. If the horsepower and torque figures we've been hearing turn out to be correct, then this motor will be losing power quickly as you approach redline (like the current N54/N55 but I expect an M motor to have a better power curve). If you compare that to the power curves for the current S63tü, it makes almost 80% of its peak torque at redline while these rumored power figures would mean the S55 in the new M3 will barely make 70% of peak torque at redline so I still believe the real horsepower figure will be higher than 420, despite the rumors. We'll see.

The amount of torque you make after 5252 rpm is irrelevant. there's nothing gained by making a higher percentage of peak torque at redline.

[AlpWhite11]

Originally Posted by s62

I reverse-engineered the numbers to match the 415hp and the ~395lb-ft claimed figures. Assuming a redline of 7500 to 8000 and a power curve that looks similar to the one of the S63tu, I came up with the following output.

To me at least, it appears that all surmised numbers could very well be the nearly whole truth



Of course, max torque would be converted from NM so here are other possible torque values:

540NM = 398.28lb-ft
535NM = 394.59lb-ft
530NM = 390.90lb-ft
520NM = 383.53lb-ft

But with playing the above and the RPM one can easily hit the desired hp output

Thx for sharing your analysis. I believe these numbers.

The admins and mods here report solid info.

[Karazy]

Originally Posted by Remonster

If they're making 420 horsepower at 8,000RPM then torque will be at 275lb/ft at redline. 420 horsepower at 7,500RPM translates to about 295lb/ft at that same RPM. If the horsepower and torque figures we've been hearing turn out to be correct, then this motor will be losing power quickly as you approach redline (like the current N54/N55 but I expect an M motor to have a better power curve). If you compare that to the power curves for the current S63tü, it makes almost 80% of its peak torque at redline while these rumored power figures would mean the S55 in the new M3 will barely make 70% of peak torque at redline so I still believe the real horsepower figure will be higher than 420, despite the rumors. We'll see.

I hope your right on the horsepower. Common M, lets see 450 HP / 400 lb-ft AND nearly an 8K rpm's!!

I'm still drooling on the new C7 Stingray...

[NAV8TT]

This car needs a lower suspension

[Blindside_137]

I really don't like the hood on the 3 series 4 series form the front 1/4 view. It looks really high.

Car on the whole looks mean

[Longboarder]

Originally Posted by ATX78703

The amount of torque you make after 5252 rpm is irrelevant. there's nothing gained by making a higher percentage of peak torque at redline.

lol. 100% incorrect.

[jayzi]

Are these real LED headlights?

[solstice]

Originally Posted by BMWFB02

This car needs a lower suspension

My first thought exactly.

The bad: the big wheel gaps and ground clearance can signal EDC with a soft comfort mode that requires long springs and the sporty setting is all electric dampers stiffening which I personally don't think feel as natural and dynamic as stiff springs.

The good ( very good ). The gaps are large even on the outer side, away from the curb when cornering. That is one stiff suspension, whoa.

I hope we get the choice of a passive sports only suspension.

[Jason]

Originally Posted by jayzi

Are these real LED headlights?

Yes.

[Boss330]

Considering that it seems like BMW is typically stating HP lower than it's in reality, don't be surprised that the next gen M3/M4 has 450HP...

I recently read an interview with someone from BMW that explained that their HP claims was given for a "worst case scenario" situation (like bad fuel, hot weather, high altitude, humidity etc).

BTW. Next years F1 engines will be 1.6l turbocharged engines with a lot higher rev limit than 8000rpm...

[ATX78703]

Originally Posted by Longboarder

lol. 100% incorrect.

not really, but say what you want. engines can achieve the same goal in different ways. only thing that matters is moving the axle.

[Tåst]

Nearly 8000rpm means, that engine is heavy modified N55, not badge tuning.

....Mclaren Mp4 3.8L tc V8 revs 8500rpm.

[Dan Parker]

It's no Cadillac...

[Jason]

Added more shots:

Latest M4 Coupe Prototype on Nurburgring - in Silverstone II

[Jblack4083]

I'm still not convinced by this 420hp figure. I know the horsepower wars are ending but 420 would seem to almost put the M3/M4 downmarket unless there is a combination of weight loss on the order of 150-300lbs and extensive chassis tuning (differential, custom tires maybe?)

[CanAutM3]

Originally Posted by ATX78703

The amount of torque you make after 5252 rpm is irrelevant. there's nothing gained by making a higher percentage of peak torque at redline.

This is incorrect. Usually, the higher the percentage of peak torque is produced at redline, the higher the power output of an engine.

And power best indicates the capabilites of an engine .

[CanAutM3]

Originally Posted by s62

I reverse-engineered the numbers to match the 415hp and the ~395lb-ft claimed figures. Assuming a redline of 7500 to 8000 and a power curve that looks similar to the one of the S63tu, I came up with the following output.

To me at least, it appears that all surmised numbers could very well be the nearly whole truth



Of course, max torque would be converted from NM so here are other possible torque values:

540NM = 398.28lb-ft
535NM = 394.59lb-ft
530NM = 390.90lb-ft
520NM = 383.53lb-ft

But with playing the above and the RPM one can easily hit the desired hp output

Nicely done

[solstice]

This car will be a looker for sure. Dang, those two pix of corner entry from the front are HOT.

[Boss330]

Interesting article on the McLaren MP4-12C on the dyno and with power curves.

http://www.edmunds.com/car-reviews/t...no-tested.html

As can be seen on that engine, it's possible to combine high end power, high rev limit and turbocharging.



Interesting overlay of power curves for the McLaren, Porsche 911 GT2 RS and Lexus LFA:

[ESC OFF]

Originally Posted by Dan Parker

It's no Cadillac...

....and no matter how hard it tries, it never will be....

[GOLFFRR]

I was under the impression the coupe and the sedan would be released at the same time?

are those dates confirmed or just estimates?

either way pretty exciting. I am really looking forward to seeing how they can improve over the e9x. The e9x is such an awesome car. I can't wait to see this unfold!

[burrito007]

Originally Posted by Gjm127

Nothing is new here except for the doubtful 8k rpm red-line which to me sounds impossible with that many turbos attached to an I6 that boasts around 415HP and 400 lb.ft torque..
If that's true, I'm all for it, I guess they're trying to make up for loss in the capability of a high-reving V8..

edit: E46 M3 had an 8k RPM redline too, my comment is flawed lol

But you are correct about the HP/TQ comment. That tq curve is going to have to be ^ instead of a nice flat curve. remember the e46 m3 only had 262 tq right up to around redline and it made 333 hp. for power to be 415 at redline, the tq will only be in the 300s.


if this is all TRUE - the car will be a real monster when tuned to hold boost to redline - we are talking 600hp.