^^ For me likewise around 230 kp/h or maybe a bit more, back in late 1985 with my VK HDT Commodore. Very stable, couldn't hear the motor at all, just the wind rushing over the roof. Speedo pegged out at 200 but the tacho was showing 6250 .. 1250rpm into the red
A friend once had the speedo needle of his 1955 Beetle right off the dial and pointing completely vertical, as in south. This was down a BIG hill in neutral, probably around 85-90mph (indicated) and btw on 135mm retreads! The speedo in those old Veedubs only goes to 70mph but he got the needle aiming straight down at the 'P' in MPH