I've only driven one TVR, not really my type of car tbh but they are undoubtedly fun in the right situation.
If we're right about the Cologne V6 then there is a 24-valve 4 cam Cosworth unit based upon it. Ford used it to great effect in the last of the Scorpios. As is so often the case, not too much, but sadly a little too late - the competition had moved on by this time.
Not massively powerful at circa 200-210 ish bhp but I'll place a couple of quid on there being plenty of tuning options available.
It did, however, deliver its power in a sublime yet urgent way.
How far are you planning to go? Or not, even? Keeping your car as original as possible is sometimes the appeal of such models as the S2.