2018 Alpina B4 S coupe review

At first glance, it would be easy to mistake the grand touring Alpina B4 S coupe for just another BMW 4 Series. On the surface, there’s not much to set it apart from a regular 440i coupe. Keen-eyed BMW fans will immediately clock the subtle front lip, heckspoiler rear lip, multi-finned alloy wheels, and quad-tipped exhaust, but unlike a pumped-up M4 and its parade of unique panels, the B4 S mostly flies under the radar.