The BMW 6 SERIES GRAN COUPE (2015-18) 640I 4DR GRAN COUPE 3.0 SS 320 EU6 M SPORT AUTO8 is a premium four-door grand tourer: sleeker and more stylish than a conventional family saloon, but more practical than a two-door coupe. In the UK, it sits in the luxury executive market, competing with the Audi A7 and Mercedes-Benz CLS. With a smooth 3.0-litre petrol engine, sporty M Sport look and automatic gearbox, it suits drivers wanting strong performance, comfort and presence for commuting, business trips or long-distance travel. The rear doors and four-seat-friendly cabin make it a more usable choice for couples or small families, though running costs are likely higher than mainstream saloons. Mycarcheck records 327 look-ups covering 106 VINs; cars averaged 49,000 miles, 7,000 miles annually and 2.35 previous keepers. The private-sale valuation averaged £19,900, a snapshot for comparing examples, not a guarantee of an individual car’s price or condition.