I think the low contrast on speedometer markings is an issue irrespective of how good your eyes are because low contrast automatically implies that there will more angles of sunlight at which it will be not visible. That being said, I am not sure why we need to see those markings so accurately while driving. The speed shows in huge fonts in the center anyway. As for the power, why do we need to see the accurate value while driving? May be for fun once in a while, but otherwise, just an estimation based on the blue, orange, and green dials was enough, I thought.
Don't get me wrong, I don't mean to attack anyone or anything. I do not have any driving experience outside of this car, so I am wondering if there is something I should be looking at and/or measuring that I am not.