There was quite an interesting youtube from Engineering Explained speculating it had enough power to do 400 mph. There may have been other constraints limiting things like the tyres being safe and apparently the battery only has capacity for 2 mins at full power, plus bits may overheat and the like.
(https://youtu.be/z6q7du1q2U8)
It's also interesting that the fastest time on the Nürburgring at 5 min 19 was from a Porsche hybrid with 900 hp, a fair bit quicker than the BYD which took 6:59 I think. The Porsche had a lot more downforce than the BYD.
>the battery only has capacity for 2 mins at full power
"The tires on the Veyron can only last 15 minutes at top speed, but that's ok because the fuel tank only has capacity for 7 minutes at top speed." (From memory, IIRC, Top Gear on the Veyron)
https://youtu.be/jk1t6S737Cs?t=393
> the tires will only last for about 15 minutes but it's okay because the fuel runs out in 12 minutes
> 5 min 19 was from a Porsche hybrid with 900 hp
You're talking about the non-production Porsche 919 Hybrid Evo race car. A Corvette ZR1X did 6:49 with a third of the HP
Yeah, the weight and battery are the limiting factors. Their battery tech is impressive though.