The problem with all this data is that you cannot rely on it's accuracy. According to the data from mg-rover.info there are only 715 MG ZT and ZTT, does that mean that there are 169 R 75 V8's? I know how frustrating it is having debates about whether SE's are rarer than non SE's but the accurate, definitive figures are not available. We know, for example that there are two cars with 007 as the last three digits of the VIN, we also know of another example of this duplication. I think the only thing we can be certain of is that no-one has accurate data.
Nich.