Hi @tobr

I think I read somewhere that the 4litre Convertible was only available with a manual gearbox option until 1987 when an automatic gearbox option was available. That might mean there were quite a few produced in the early years of production, but towards the end when yours was produced it might have been a lot lower with more folks going for the automatic.

I’ll keep my eye out for some official statistics.

Laurence