Sorry if a dumb question, but what's the differences between the various VRS petrol engines? (245/230/220). Are they fundamentally the same, but the 230 and 245 are at a higher level of tune to the 220 (effectively a factory remap), or are there genuine differences between the engines? (eg. bigger turbo).    Off the back of that question, what does that mean for a remap? If they were effectively the same engine (in different states of factory tune), does that mean a remap would get you