Complex sentence: The use of the turbocharged engine required larger air intakes to feed the two intercoolers, these air intakes (between the doors and the rear wheels) were larger on the production version of the XJ220 than on the concept car.
Split into simpler sentences: The use of the turbocharged engine required larger air intakes to feed the two intercoolers. Situated between the doors and the rear wheels, th air intakes were larger on the production version of the XJ220 than on the concept car.