Internal marketing bulletin was finally released for the US market, detailing 2014MY LR4 changes, pricing of base model and all options. Sorry about the poor quality of the PDF, but I stitched it together from a series of jpeg and bmp files... Should be readable though.
MY2014 Land Rover LR4 product announcement with pricing
Lots of questions answered within. Somewhat related, Motor Trend recently tested both SCV6 and SCV8 versions of the new 2014 RRS and they clocked 0-60mph times of 5.7 seconds and 4.3 seconds, respectively (that's right, 4.3 seconds for the SCV8, that's easily Cayenne Turbo territory!)
Even considering the much lighter weight of the new Sport, the V6 S/C is obviously no slouch and handily outperforms the outgoing NA V8 of the 2013 Sport in sheer performance. I think it will perform just as competitively on the LR4, despite the heavier platform. The towing numbers, for example, remain unchanged from 2013 to 2014, despite the smaller displacement and "loss" of two cylinders.