Can anyone tell me how much extra headroom there is a LWB please ?

Also does anyone know the price of the x330 at launch?

 

I believe there is 1" extra available headroom, but this may only be for the rear passengers because of how the sunroof was positioned.

The price for a SWB X300 I believe was around $60,000, add an extra $5 for the LWB to make $65,000. Of course, these prices are USD which makes them useless for you across the pond.

 

After a lot of digging a round I finally got the answer from my friend at Jaguar Heritage.

They say there were the prices on launch Dec. '95

XJ6 3.2 £32,850
Sovereign 3.2 £42,400
Sovereign 4.0 £47,150
XJ12 £57,200

I'll let someone else source the SWB if you require it.