The same as the volume of water you can fit in it. Grab the garden hose and fill your boot up with water. Then measure how many litres fit in your boot. Each litre is the same as 1 cubic metre. So this will tell you the volume of your car's boot.
Alternatively, you could just measure the approximate boot height, width and depth and multiply them together to get the volume :)
due to irregular shape of luggage room
It is the back side storage area for luggage. (Trunk/Dicky)
It is called the boot.
Its called the trunk in the US and the boot in Europe.
box">boxtrunk or boot
1.8x1.2x0.5metres approx
With the current run-up in gas prices, many consumers are feeling the pinch. Despite high gas costs, many who go on road trips continue getting larger vehicles because of the additional space. A compact and fuel-efficient car can still provide adequate luggage space, however. One easy way that fuel-efficient cars with little space for luggage can still be utilized for a vacation is through the use of car luggage racks. These tools can be affixed to the roof of a car. A large container can then be attached to the luggage rack and aspiring travelers can then fill the luggage container with all of their needs for a week-long road trip. Car luggage racks are a great way to take all that is needed while driving a smaller vehicle.
Volume!
The volume.
I do not know of any such car. Minivans and SUVs have a small amount of luggage room in the back, but not enough to stow luggage for 8 people. Your best bet is to rent a passenger van (make sure it has luggage space in the back -- not all of them do -- or have the agency remove one of the bench seats). The alternative is to rent multiple vehicles.
car boot is not opening
Boot is the trunk, us Americans call the boot the trunk.. most foreign countries call it the boot. For future reference: US Other Trunk = Boot Hood = Bonnet Roof = Hood Engine = Lump and Im sure theres much more