These are spy shots with the least disguise so far of the upcoming coupe version of the new BMW 3 series – rumoured to be named the 4 series. On the latest prototype, we can very well make out the shape of the upcoming two-door coupe which should be larger than the 3 series. Image galleryOr it could be seen as a smaller version of the 6 series coupe. Speculation is that the new 4 series will feature both two-door and four-door sport coupe variants, to compete against the likes of the Audi A5 range, and that BMW may also introduce a cabriolet version too. Lots more Wheels24 spy shots.