It has a lot of batteries and two motors.

I found only one image of the internal of this car. It shows battery underneath, not inside bonnet.

i.dailymail.co.uk/1s/2023/07/04/08/72822105-122598...g

They probably use that diagram to assemble them in the factory. The level of detail is breathtaking!

What I don't understand what the long bonnet is for!

I feel being an EV does not require such long bonnet but RR is too afraid to lose their signature shape which they had for a century.

Think you have answered your own question here!.

While there is certainly an argument for making more use of the packaging opportunities given by a "clean sheet" EV design for a saloon car or limousine, the Spectre is a fastback/coupe and as such, image and style is paramount. Seems there is plenty of space for four occupants, so its not like using the proportions of an ICE equivalent has compromised accommodation. As for the company trying to do anything other than traditional RR proportions?, it is fraught with risk, just look at the Cullinan!

Re under bonnet space, I believe there is a storage area for the charging cables. Maybe not brilliant (given the proportions of the car), but better than having to keep them in the boot.

The other question I have is why it has only 2 doors!

After spending £300k on a car, how one can tolerate getting into rear seat in an inelegant way?

Or typical buyers of these cars don't use rear seats?

I have no doubt there will be a 4 door Rolls Royce EV before long for those who want\need extra practicality and/or easier rear access.

But the Spectre is taller than you'd think* for a 2 door fastback coupe, so I doubt access to the rear would be too difficult for most.

*At 1559mm tall, it is taller than many small SUV/Crossovers!