The BMW 6 SERIES GRAN COUPE (2011-15) 640I 4DR GRAN COUPE 3.0 SS 320 EU5 SE AUTO8 is a four-door luxury coupé with saloon practicality and sleek styling. Its 3.0-litre petrol engine and eight-speed automatic place it in the premium executive class, as a distinctive alternative to the BMW 5 Series, Audi A7 and Mercedes-Benz CLS. Its spacious cabin and comfortable ride suit long-distance commuters, business travel and families seeking premium comfort. The powerful, smooth drive and elegant design stand out, while four doors add everyday ease over a traditional coupé. However, its size and running costs may not suit tight budgets or new drivers. mycarcheck.com logged seven checks across three VINs, a small sample for this model. They showed average mileage of 37,000 miles, annual mileage of 1,000 and 0.57 previous keepers; average private-sale valuation was £14,300. Treat these as a snapshot, not a guaranteed price or condition assessment.