This is just very much not true, Audi, Mercedes,Toyota, BMW breeze through it, hell my friends audi S4 from 2004 regularly shoots 240+ over the autobahn, and we never break a sweat.
- BMW is indeed very nice, I agree. I also once had a 6 series convertible which was - apart from the very low consumption (Diesel) - really nice to drive. Their cars are indeed a good alternative at a lower price point. - Audi is the utmost catastrophe. Apart from the abysmal navigation system, the car simply doesn't feel safe at higher speeds (had an A6, your mileage may vary with tuned S models). I didn't want to drive faster than 180km/h - Same goes for Mercedes (drove C, E and S Classes). The entertainment system is straight from the 90ies and the steering gets super wobbly at higher speeds. - Toyota - are you kidding me? Very reliable, good value, but nowhere near the driving capabilities of a BMW or Porsche.
Of course they are all nice cars and should do the job, especially in countries with speed limits - until 120 km/h that all doesn't matter. I'm just saying, if you really want (and can) go fast, most of those cars don't deliver in my opinion.