I've recently bought a 1994 Astra F 1.8 GSi. It has the Ecotec engine. I've just recieved the logbook from the DVLA and it stses that it's a GSi 8v. Didi this model exist? I thought all GSi's were 16v. It has the 16v badging and it used to belong to a well spoken lady driver with kids, so it's unlikely she would rebadge it. Is it a typo? Help I'm confused!