My Taycan 4s is faster than advertised

[Jasper4S]

To my surprise I was able to hit a speed of 258m/h instead of the advertised 240-250km/h for the Taycan 4s. It felt software limited, at a speed of about 255km/h it felt the vehicle was holding back. (Location; Autobahn - road was almost empty)

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[kurand]

Generally speak, most on-board car speedometers display higher than actual speed. They can over read by up to 10% depending on prevailing legislation. I’ve not checked the accuracy of the Taycan speedometer, but did you check the speed with something with known accuracy?

 

[chun]

Taycans are soft limited to 259 kmh as far as my dealer told me - depending on model, some will reach that easier than others. Speedometer might display more in error a few %.

 

[f1eng]

I have checked my Taycan speedo against a GPS app, which has to be correct, and it is going 30mph at an indicated 32.
I haven’t checked higher speeds yet but our Prius is 33 and 76 indicated at 30 and 70 so on the legal limit of accuracy in the UK.

 

[RAHRCR]

To my surprise I was able to hit a speed of 258m/h instead of the advertised 240-250km/h for the Taycan 4s. It felt software limited, at a speed op 255km/h it felt the vehicle was holding back. (Location; Autobahn - road was almost empty)

Another possibility (aside from questioning the accuracy of your results) is Porsche’s long standing tradition of underrating their vehicles. They tend to have more power than advertised and better 0-60’s in the real world. It would not surprise me to have them slightly exceed the advertised top speed.

 

[Jasper4S]

Another possibility (aside from questioning the accuracy of your results) is Porsche’s long standing tradition of underrating their vehicles. They tend to have more power than advertised and better 0-60’s in the real world. It would not surprise me to have them slightly exceed the advertised top speed.

My thoughts too.

What others suggest is true too, but in that scenario the vehicle needs to stop at 250 - since in this scenario it knows the GPS speed. But the vehicle doesn't know the GPS speeds, else it would show it rather than the now shown speed

 

[andix]

Yes, Porsche underrates their cars. That's a historical fact.

But also, by law, the speedometer _must_ run ahead in the EU.

 

[enzo5000]

I use the "Speedometer" app on my iPhone to test the accuracy of my vehicles speedos. It's a GPS based app that is very accurate.

 

[Rcrewse7]

I didn’t GPS verify at top speed, but I’ve hit an indicated 160 mph on my 4S a couple of times. When I have checked GPS at lower speeds, it’s pretty close to indicated speed, within 1-2mph…far closer than what my older German cars would be.

 

[Porschejev]

Mostly it is 5-10% less than what meter says. I have reached 260 km/hr on German highway. Think it could perhaps go faster still. Check with an app like I guess will work, Flitsmeister ..

 

[ZephyrSurfer]

And I'm sure, in addition to the speedometer variance, the top speed is software-limited. They don't want to cannibalize 911 sales, after all.

 

[Jay]

I have checked my Taycan speedo against a GPS app, which has to be correct, and it is going 30mph at an indicated 32.
I haven’t checked higher speeds yet but our Prius is 33 and 76 indicated at 30 and 70 so on the legal limit of accuracy in the UK.

I've owned 7 Porsches. Every one of them indicated 2 mph above the GPS speed.

 

[Tighlines]

Interesting. I find it strange the variances on max speeds, you would think they all would be exactly the same. On my top end run, I got to 150mph quickly, then the software limiter took over and really slowed it down to 154mph where it topped out. I didn't feel comfortable pushing it further considering the time it took to get there and I was not on the autobahn.

 

[WasserGKuehlt]

Interesting. I find it strange the variances on max speeds, you would think they all would be exactly the same. On my top end run, I got to 150mph quickly, then the software limiter took over and really slowed it down to 154mph where it topped out. I didn't feel comfortable pushing it further considering the time it took to get there and I was not on the autobahn.

I would expect a naturally-aspirated Taycan to be a tad slower at high altitude; a turbo would have fared better.

(I'll see myself out.)

 

[Tighlines]

I would expect a naturally-aspirated Taycan to be a tad slower at high altitude; a turbo would have fared better.

(I'll see myself out.)

That is one of the main reasons I switched to an EV. I do a lot of mountain road driving and the power reduction as you gain altitude is aggravating. I started with a Lexus GS F (naturally aspirated V8), then moved to the Pan Turbo (twin turbos really helped but still very noticeable). The Taycan shreds at all altitudes (obv), I absolutely love it.

(You don't have to leave, sarcasm is welcome here).

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