Ferrari SF90 Stradale : picture and news thread

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From SF1000 presentation/Teatro Valli - Regio Emilia
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What is the reason SF90 would be slower to 300 than LaF? Weight?

 

Faster speeds is exactly when you need more weight, not less

 

The Stradale's front motors disengage above 210 kph, thus the Stradale is left with about 840 CV, vs the LF's 963.

Is this a new kind of physics? What you are saying makes no sense whatsoever.

 

Both have variable aero and the LF is the more sophisticated one. The power difference is also large (about 15%).

 

Didn’t a forum member tell us that the energy is redirected to the rear motor so the resultant combined power is more or less unchanged?

 

875 hp it seems

 

Who said that? At any rate, there is no physical connection between the front motors and the rear wheels. The problem is not a lack of energy (electrical juice), but a lack of power. The ICE and the motors that power the rear wheels produce a maximum of about 840 CV. The front motors are dead weight above 210 kph.

Could be, but last time I crunched the numbers it added up to around 840. There is no direct quote from Ferrari but if you subtract the power of the front motors from the total claimed power (1000 CV) you come up with about the power I mentioned. Anyway, the fact remains that you have significantly less than the maximum power of 1000 CV above 210 kph.

 

This is post I was referencing.

 

Okay, I see what you mean. Still it would be around 875, as jpalmito mentioned. Still way short of LaFerrari's power and with more weight to boot. The LF will be significantly quicker above 210 kph.

 

Thankfully I don’t care about acceleration at that speed. How it pulls from a roll is more usable on the street, and the SF90 won’t disappoint in that area.

 

repetita juvant :
the rear electric engine only have 204cv/150kw, and is more powerful and bigger than the front engines...
220hp is the total electric power with all electric engines combined, but... this value is voluntarily limited to not overcharge / drain the batteries but... still, 780+204 is not equal to 840hp

 

So, down from 1000 bhp to 984 beyond 210 km/h ? Or did I misunderstand? (Sorry for my ignorance)

 

Nope. That's about it. Note that it is 1000 ps to 984 ps, not bhp.
What's more impressive is the actual torque figures. The La F can muster a healthy 664 lbs. The SF90 will put down a whopping 769 lbs, above 210 kph. The number is even greater below.
Considering the fact that the SF90 only weighs 15 kg more than a La F, and not only has an 8 speed dct, but also 105 lbs of torque more, I completely fail to see how the La F can be faster at anything - even the faster Fiorano lap supports this.
The weight difference between the two cars are completely insignificant, and not only does the SF90 have quite the power and gear ratio advantage, it is 4wd.
I know Ferrari claims faster accelleration numbers for the La F, but I'm not buyin' it. Modern tyres, modern esc, more power and better traction. I believe a La F is faster to 100, 200 and 300 when I see it. The physics sure as heck does not support it.

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"Considering the fact that the SF90 only weighs 15 kg more than a La F"

?

the laferrari dry weight is about 1255kg, that is pretty lighter than the sf90 stradale dry weight (1570kg) which have tons of extra hardware: a bigger 7.9kw battery, three electric motors instead of one, richer interiors and is not based on a full carbon chassis like the laferrari (SF90 stradale have some carbon here and there but...)
And of course, both of them weight even more with fluids, driver etc...

 

Ferrari does not declare the exact value. So, given that, say that without the two frontal engines the SF90 Stradale have 840hp is "wrong": we only know, for sure, that the rear electric motor alone is capable of 204hp/150kw, so from a mere mathematical point of view and according to ferrari's numbers the total value with the front engines disengaged is 984hp, not 840hp. Still, both of this values ar not reported by any part in the technical sheet, and the total petrol/rear electric combined-power isn't reported too or, at least, I've never seen it. We can only rely on those few numbers that ferrari tells us...
At the end of the story, as I have already said, I still find that such a heavy car had to have more than 1000hp "only" to dig a significant gap from the rest of the product range and to rest competitive for next years. They've been a bit "tight" for a top of the range supercar that will remain for several years as best products in line... but competition that is already strong today (7.1s 0-200 for a "simple" 720s..)
So I hope that the numbers declared by ferrari are voluntarily underestimated

 

We also know that the front motors contribute about 160 CV, so if you subtract 160 from 1000, you are left with 840. I agree that we don't know anything official though. The fact that they don't declare the 0-300 kph time though is fishy...

You cannot compare different numbers, you need to compare factory claims only. The Stradale has a claimed 0-200 kph sprint in 6.7''; the 720S in 7.8''. We know that the Pista and the 720 are neck and neck, so the Stradale should be comfortably quicker.

Your weight figures are way off, mate. The LF weighs about 1580 kilos dry, with a full tank of fuel. The Stradale weighs about that dry. The LF should be a lot lighter. It also maintains its full power till its top speed, unlike the Stradale.

 

We cannot just subtract. Since we cannot just add the HP of electric motor and ICE, we cannot just subtract.

 

Indeed. Thus, we cannot add the 220 CV of the rear motor to the output of the ICE either. What we know is that the front motors disengage, which will surely result in a loss of total power. The amount of power lost remains a mystery. We will have to wait for the stopwatch...

 

From what I can find, the La F officially weights 1585 kg and the 1255 was a weight given pre-release.

 

Some years ago there was a thread here that went on for some time regarding a California USA collector who would check give the real world weight for various Supercars. I don't recall if that project included the LaFerrari but many other cars were included and they were mostly actually heavier than claimed.
After all these years no one has taken the time to weigh their LaFerrari?