No real difference, I have factory 17s on my D4, only difference is rim width, my D4 factory rims are 18 x 8", my D3 factory rims are 17 x 7" both have the same offset.
OK I went and looked, more because I wanted to know, they are the same front and rear.
Front is 1605 D3 and D4
Rear is 1612 D3 and D4
Only difference is the turning circle
D3 is 11,5
D4 is 11.8
See here
http://www.caradvice.com.au/compare-...r-discovery-4/
Baz.
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