The 640i had a wonderful exhaust note enhanced when the gearbox was put in manual mode and with sport mode selected. Seats were what you expect from BMW and interior styling and materials were typical of the Munich based Bavarians.
The car accelerated well – shifts in automatic mode being smooth (and often given the eight forward speeds) – in manual mode the shifts were crisp and accompanied by that fabulous mellifluous soundtrack the inline six makes. The 640i is a joy to drive and a bit more pure if ordered without xDrive. There’s a connectedness of the driving experience of the 640i to the other models in the BMW lineup.
The Audi A7 has a lot going for it, good engine, great brakes, excellent interior and a significantly lower price than the BMW 640i xDrive Gran Coupe (does BMW charge for its cars by the length of their names?). But given the steering feel of the Audi A7, and how that would annoy me every time I drove it, I’d pony up the extra bucks for the BMW.