About BMW 645Ci
The second generation of the BMW 6 Series consists of the BMW E63 and the BMW E64 Grand Tourer. The doors and bonnet are made of aluminium to reduce weight. The tailgate and front wings are made of carbon-fibre reinforced plastic. The coupe was introduced at the 2003 Frankfurt Motor Show. Convertible models were unveiled at the 2004 Detroit Motor Show and went on sale in mid-2004. The convertibles had an unusual retractable roof with side rails and an integrated windscreen that could be raised or lowered at any time.
The M6 version was initially introduced as a coupé at the 2005 Geneva International Motor Show. And later, the convertible form was introduced at the British International Motor Show in 2006. The M6 is powered by the 5.0-litre naturally-aspirated S85 V10 shared with the E60 M5. It generates 373 kW at 7,750 rpm. The majority of the cars were produced with a 7-speed automated manual transmission. However, 6-speed manual transmission of the BMW 645Ci was also available in the United States. Coupes die or thrive by their styling, and the BMW 645Ci is yet another complex BMW shape that is more cerebral than emotional. The cab-backwards body is the off-the-steroids production version of the gull-wing concept car from the 1999 Frankfurt auto show.
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The BMW 645Ci has 43 more hp but weighs 350 kg less. And it should be at least a second faster to 60mph, depending on which gearbox you choose. Not everyone will like the styling or the iDrive system, but lighter, faster and more economical are trends that everyone will appreciate. The BMW 645Ci shifts seamlessly, and power flows through the steering wheel in a smooth wave. Two large silencers muffle the sound of the V8 engine through two polished exhaust pipes on the BMW 645Ci. BMW claims the BMW 645Ci accelerates from 60 mph in about 5.5 seconds with the six-speed transmission. There is no reason to doubt this. If you opt for the automatic transmission, it shifts quickly and smoothly - both uphill and downhill. Unless you're a sadomasochist, it's best to avoid the unfortunate SMG.