Thank you guys for the hints.

Look my car can only be worth around £8000 on the market, I just love the drive. The reliability is cr*p.

How much should I be looking to spend to make the dead beast alive again?

What would you do in my shoes, much sensible advice as posible please.

That website on race engines on the m62, 600 bhp, can you imagine that on a X5, probably beat a ferarri ?