Spy shots of cars are wonderful aren't they? They appeal to your most basic voyeuristic tendencies and no matter how heavily-disguised the cars are, it's always fun trying to workout what's going on under all that black padding. We've seen some pretty pathetic attempts at disguising cars - a bit of tape here and there - and some real determined hide-all, all-out leather-covered versions. It is a bit of fun so we thought we'd run a quiz of our best spy shots just to see how eagle-eyed you all have been. Just try and work out what which car, from the selection of four photos on each panel, is the one we've identified.