@gazzo, fundamentally you're correct. So far we are working on changing the cosmetics of the vehicle rather than altering the big heavy stuff like engines. Here in the UK we have a partnership with Cosworth, the performance engine house, and that may be an engine worth discussing with them. Keep you all posted but please don't hold your breath.
In terms of off-roading, well we're introducing an Expedition model very soon but there's some things missing from the basic specifications of the car. For instance, a sump protection plate, off-road wheels and a snorkel to name just three.
Cheerio for now and thanks for all your feedback.