What is it?
This is the third-generation 6-series coupe. The upmarket two-door, previewed in near-production-ready guise as a concept at last year's Paris motor show, is set to follow the recently introduced second-generation 6-series convertible into North American showrooms in October as a 2012 model.
It's not the last of the new 6-series models to arrive here, though. BMW is planning next year to debut a four-door derivative to rival the Audi A7 and the Mercedes-Benz CLS, with styling first previewed on the GranCoupe concept car.
The new 6-series is based on the same underpinnings as the latest 5-series, complete with a new double-wishbone front suspension and an electromechanical steering system. Among the long list of options is a rear-wheel steering system dubbed "Integral Active Steering," and "Dynamic Damper Control," both of which we recommend to anyone seeking heightened levels of response.
As with its open-top sibling, the new 6-series coupe initially will be offered with the choice of two turbocharged direct-injection gasoline engines--the familiar 315-hp, 3.0-liter inline six-cylinder unit that powers the 640i and a 401-hp, 4.4-liter V8 in the range-topping 650i.
BMW also developed a model running a 308-hp version of the 3.0-liter inline six-cylinder diesel engine, but it is not planned to join the North American lineup anytime soon.
What we can expect, however, is a new M6 running the same 552-hp turbocharged 4.4-liter V8 engine revealed in the new M5.
Both gasoline engines come mated to a standard eight-speed automatic gearbox. The 640i comes as standard with rear-wheel drive. But in a first for BMW's big coupe, buyers will be able to choose between rear- or four-wheel drive with the 650i.
As part of an effort to improve fuel consumption, the new model gets automatic stop/start, brake-energy recuperation, aerodynamic-enhancing flaps behind the grille that close on part throttle to smooth air flow, and ancillary engine functions, including on-demand oil and water pumps that draw energy only when required.
What is it like to drive?
The new 6-series coupe is a highly competent car--so competent over a wide range of dynamic disciplines, in fact, that it can seem a little clinical at times. Look beyond this characteristic, though, and you discover a car that is capable of devouring large distances with ease in the best grand-tourer tradition.
The car's best work is done on the highway, where it cruises serenely with impressive refinement while imparting a feeling of always having a good deal of reserve at typical North American speed limits.
Despite tipping the scale at 3,660 pounds, the 640i is quick in a straight line. Its engine throws out 332 lb-ft of torque at just 1,300 rpm, so you don't need too many revs before tapping into a solid stream of performance.
BMW claims a 0-to-62-mph time of 5.4 seconds. Top speed is limited to 155 mph.
The electromechanical steering, with BMW's variable assist setup as optional, gives the 640i astonishing agility for such a big and heavy car. Despite the weight, it carves through corners, even at high speeds, in a flat and unflustered manner, relying on the abundance of grip to ensure that the driver rarely needs to correct the line. An armada of driver aids also ensures any wayward action is quickly handled. And with the Dynamic Damper Control providing continuous adjustment of the stiffness of the car's suspension, it also rides in a firm but well-controlled manner.
BMW's designers have placed a great deal of effort into lifting the appeal of the car's cabin, which receives a stylish, driver-oriented dashboard, the latest version of BMW's iDrive system and the same controls as those found in the latest 5-series.
With a 2.8-inch increase in length and a 1.5-inch gain in width, the new car offers greater levels of accommodation up front, broader seats have more substantial back rests. A 3.0-inch stretch in the wheelbase also added space in back, although the individual rear seats are still best suited to children.
Do I want one?
No doubt about it, the 640i is an impressive machine--from its high level of quality through to its elegant new styling, eager performance and improved everyday practicality. It is a more rounded rival to cars such as the Mercedes-Benz E-class coupe and the Jaguar XK than the previous 6-series coupe. However, it lacks the engagement of true
sports car
such as the Aston Martin Vantage and the Porsche 911--the latter of which BMW chassis engineers suggest served as a benchmark throughout the new car's development. Think of it more as a traditional grand tourer, and you'll be on the right track.
