BMW just unveiled the BMW M3 Concept at the Geneva Motor Show in a coupe variant but hasn’t released any engine specs as of yet. Until official engine details are released on March 22nd, expect more spy shots to pop-up. Recent shots by spy photographer Hans Lehmann show the BMW M3 sedan and convertible, which are expected to launch following the debut of the BMW M3 coupe. These are just beautiful. Head over to WindingRoad for more.