What are the dimensions of a car measuring?

It all depends on who’s providing the numbers, Richard. Over the years, I’ve seen plenty of car specification sheets that list the overall width including the mirrors, and plenty without the mirrors.

These days, it’s much more common to find the width measurement includes the mirrors, purely because an exterior mirror on each side of the car is now a standard fitment. A few decades ago, that wasn’t the case and even a driver’s side mirror was an extra-cost option. That’s why the official width specification of an early car will often ignore the mirrors.

Also, don’t confuse the overall width with the vehicle’s track dimensions. The track is the measurement from the centre of each tyre to the centre of its opposite number. Track measurements are rarely the same front to rear, either.