Greetings, all!
If it made sense, I'd stretch to a 50d, but I'm also considering the 30d (which I could remap for additional power), the 40d, and the F15 X5. Focusing on used cars with acceptable mileage and history are within my budget of £15,000 to £26,000.
A couple of particular enquiries:
How are the handling and performance in actual driving situations different? Is the 40d/50d's twin-turbo system significantly faster at low RPMs than a remapped 30d, for instance, in terms of throttle response and torque?
Is the more complicated 40d/50d configurations less reliable than a chipped/remapped 30d in the long run, or is it the other way around? Have you noticed any typical problems?
I've heard that the 40d is more refined than a tuned 30d, but I'm looking for real-world owner insights if anyone has any...
In ahead, I'm really grateful.