BMW 6 Series Convertible Joins 6 Series Coupe March '04 Launch

Published: 11th December 2003

BMW 6 Series

Lightweight design

While extremely stiff, the 645Ci Convertible weighs just 1,815 kg, using a combination of aluminium, steel and synthetic materials. This intelligent use of lightweight materials includes aluminium bonnet and doors, thermoplastic front wings and boot made of Sheet Moulding Compound (SMC).

The UK will see approximately 1,000 BMW 6 Series Convertible models a year from 2005 (around 6-700 in 2004), and along with the BMW 6 Series Coupé, the car features a host of state-of-the-art and driver-oriented technologies including Dynamic Drive, Active Steering and Dynamic Traction Control.

Dynamic Drive

Dynamic Drive is BMW’s revolutionary system of active anti-roll bars that significantly reduces body sway in bends. Optional Dynamic Drive uses step motors which build up counter forces on two anti roll bars, preventing occupants being rocked from side to side, absorbing up to 80 per cent of roll at lateral forces up to 0.6g. The result is a more comfortable ride even when the car is being put through its paces on twisting mountain roads.

Active Steering and DSC

Active Steering and Dynamic Stability Control (DSC) are two driver assistance systems that work together to enhance safety and stability of the new BMW 6 Series, without compromising driver involvement.

Debuting on the BMW 5 Series but tuned for the new BMW 6 Series, Active Steering features a set of planetary gears powered by an electric motor. At low speeds Active Steering amplifies driver inputs at the steering wheel, making it easier to manoeuvre in town driving or when negotiating tight turns. Steering becomes progressively more indirect and firm as speed increases, enhancing stability and comfort ensuring smooth and precise handling at all speeds.

However Active Steering also helps prevent oversteer in corners by taking information from DSC yaw sensors and creating subtle steering corrections. The full range of DSC sensors – measuring steering wheel angle, individual wheel speed, and yaw rate – supply the data that allows DSC to reduce engine power and brakes individual wheels if absolutely necessary. However in hard cornering, where oversteer threatens, the intervention of Active Steering means DSC operates less frequently. The result is improved safety but a more involving drive for purists.

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BMW 6-Series

Our BMW 6-Series Guide lists the full specification of the current UK 6-Series range, including car prices, fuel consumption, dimensions and other vital data.

Price Range: £49,300 - £88,225
Body Styles:

Fuel:

Models in the range: 14
Our Car Buyer’s Guide covers all of the UK’s major new cars and includes CO2 ratings and car insurance groups. Data updated on the 30th Mar 2008