TBH if you've never driven another Zed, would you know those things? It took me a few minutes looking at Amandas Alfa to work out where the turbo was and I know what they look like and where its likely to be. For someone who knows nothing about cars (which tbh this seller probably doesnt know squat), if the logbook says its a turbo I think you'd beleive it. True you would expect them to know better, but they wouldnt be the first person not to know. Superchargers are very obvious, but turbo's are quite well hidden under the engine. Its the FMIC and pipework you can easily see but again only if you know what you are looking for