The latest and current factory front suspension systems on the Classic Morgans are all linear rate, but on at least some of the recent Plus4 cars that I have seen at the factory still regressive (ie: starts very stiff then goes less stiff due to compressed rebound springs - not good). The rising rate front suspension characteristic has been developed remote from the factory by their front suspension supplier, the factory has not been developing anything similar. I do not (yet) know what springs and dampers the new 3.7 Roadster will use, but I believe that the new rising rate systems with the specially tuned dampers will show an improvement in ride. I can not comment on any change in roll stiffness as that is so dependent on the linear rates that the 3.7 Roadster will use as standard. Handling of the test cars so fitted with the rising rate kit are well up to the standard of the current cars or beyond, but that is so subjective and dependent on use, skills and bravery! I hope this helps - PJB.
