It's great that other mfrs are trying to push the envelope, but the devil is in the details, right?
One, the EQXX did not average 140km/h. The trip took 11h32m, so it averaged 54mph, or about 87kph. Since it didn't stop, and since it supposedly hit as high as 140kph on the autobahn, and since it averaged 54mph, then it had to have driven at speeds lower than 50mph for long stretches. Woohoo! That's the optimal speed for the Tesla to maximize range! Hyperkilometerers rejoice!
Two, you want to compare your M3P to a vehicle with prototype low rolling resistance tires in 185/65R20 size with a 97T load rating? Are you even allowed to drive on the autobahn with T-rated tires?
Three, the motor has a peak output of 180kW. IE 240 horsepower. Yay! Gonna put your M3P to shame!
Four, if you put the trip into ABRP, from Sindelfingen to Port de Cassis, with a waypoint in Genoa, since that's the route they took, you can drive a Model 3, or a Model S, and drive at the speed limit, and stop to charge, and still BEAT the EQXX to Cassis, with 40minutes to spare.
As I said at the top, it's always great that other mfrs are trying to push technology, but this was all about lowering weight and rolling resistance and drag. There's no real new tech here. I watched the video of the drive, and it never looked like it was going faster than 60mph, so I went and read the press release, that's how I found out it took 11h32m or 54mph for the trip.
The point is, if you have a great charging network with super fast chargers at conveniently spaced distances, it doesn't really matter how far your battery can go, once you pass a minimum range of say 300+. The defining distance becomes the size of your bladder. I can't drive 600miles without stopping. I have to stop at least 3 times. And, that's exactly what ABRP recommends for optimal trip time, 3 stops. I'm sorry your M3P only as 270miles of range, but this Summer, I drove from Maine to Colorado and back, 4400 miles, and the longest leg ABRP rec'd was 173 miles. For road trips the fastest way to drive is not to try to stretch legs, but to drive fast, stop often, and use the bottom 2/3rds of the battery.