The M3 Convertible is the third iteration of BMW’s much-vaunted V8 M3 range. Despite its initial resemblance to the M3 Coupé, the Convertible shares just 20 percent of its components with its fixed-roofed sibling and exhibits 40 percent more torsional rigidity than its E46 predecessor; a car that was admired for its power but was often criticized for lacking the outright composure of the Coupé.