It isn't every day you find an ultra-rare BMW E30 M3 Sport Evolution in a barn completely unscathed by time and animals, but ...

And it seems equally certain that the actual stuff from which it was made – specifically the rear-end bodywork that differentiated it from lesser 3-series models – formed part of that appeal.

So far, there have been six BMW M3 generations, starting with the homologation special E30 in 1989 and its 2.3-liter inline-four engine. The second-gen E36 BMW M3 models followed in 1995 with the ...