BMW 1 Series Convertible

Production Cars 2 Oct 2007
BMW 1 Series Convertible

BMW has revealed the open variant of the new 1 Series Coupe. The four-seater 1 Series Convertible features a electro-hydraulic soft-top and offers a choice of two 3.0 liter engines. It will go on sale from spring 2008.

BMW 1 Series ConvertibleThe 1 Series Convertible will be available in two versions: the 128i and 135i.

The 128i Convertible, which will go on sale in the Spring of 2008 together with the 1 Series Coupé, is powered by the 3.0-liter, 230 horsepower inline six-cylinder engine generating 200 lb-ft of torque.

The 135i Convertible, on sale later in 2008, features a twin-turbocharged 3.0-liter inline six-cylinder engine producing 300 horsepower and 300 lb-ft of torque from as low as 1,400 rpm.

The unit adopts direct piezo gasoline injectors, twin low-mass turbochargers and air-to-air intercooler.

For the 135i Convertible, acceleration from 0-62 mph is accomplished in 5.6 seconds and top speed is electronically limited to 155 mph.

The electro-hydraulically-operated soft-top can be raised in 22 seconds, at speeds up to 25 miles per hour.


BMW 1 Series Convertible - Clay model BMW 1 Series Convertible - Clay model BMW 1 Series Convertible - Clay model

When the car is open, the silhouette is enhanced by the long frameless doors. The characteristic features of the BMW kidney-shaped grill, front skirt, door sills and rear skirt are identical to those of the 1 Series Coupe.

The standard soft-top is available in black or taupe cloth, or in the exclusive Moonlight Black version which is interwoven with fine shiny metallic fibers, thus producing a shimmery metallic silver appearance in sunlight. The range of nine exterior colors includes an exclusive hue: Cashmere Silver Metallic.

BMW 1 Series Convertible - roof opening BMW 1 Series Convertible - roof opening BMW 1 Series Convertible - roof opening

A distinctive feature of the 1 Series Convertible is the flared shoulder line which runs parallel to the road.  This shoulder line flows from the hood past the A pillar to the trunk lid, forming a surface which encompasses the entire interior, giving the impression of a boat deck.

BMW 1 Series Convertible - Clay model BMW 1 Series Convertible - Clay model

Top right picture – From left: Mike Ninic (Head of
Interior Design), Chris Bangle (Director Design), Adrian v. Hooydonk (Head of Exterior Design)

BMW 1 Series Convertible - Interior sketchThe view from the rear is influenced by the position of the softtop:  with the top lowered, completely concealed in the tail, the look is flat and elegant; the appearance with the top up is broad shouldered.

The trunk lid has an integrated spoiler chiseled into the rear end of the car to accentuate the short rear section.

On the 135i, an additional lip spoiler provides greater downforce on the rear end at high speeds.

The individual sections within the L-shaped rear taillights give the vehicle a lower, sportier look.

Horizontal lights integrated in the rear light clusters offer a homogeneous lighting effect with the help of light-emitting diodes (LEDs).

BMW 1 Series Convertible BMW 1 Series Convertible


BMW 1 Series Convertible - Interior sketchThe interior features an optional upholstery called Boston leather, which incorporates BMW’s Sun Reflective Technology where pigments worked into the upholstery mitigate the effect of the sun’s ultraviolet rays, reducing heating of the seats and armrest, especially for darker interior colors.

The overall effect can produce surface temperatures some 20 degrees Fahrenheit below a comparable “normal” leather interior.

The climate-control system has an additional convertible mode (compared to the system in the BMW 1 Series Coupe) designed for open-roof conditions.

The three standard modes react primarily to interior sensors, while the convertible mode reacts less to interior temperature and more to the exterior temperature and sunlight factors to establish the intensity of the ventilation.

BMW 1 Series Convertible - Interior sketch BMW 1 Series Convertible - Interior sketch

BMW 1 Series Convertible - InteriorTurbulence in the roof-down cabin can be reduced by the optional wind deflector which can be affixed to the sides of the vehicle with a few adjustments.

The entertainment system can be enriched by choosing the optional Premium Sound system, Bluetooth, the auxiliary input jack and the USB port for direct control of an Apple iPod or an MP3 player.

Galvanized pearl gloss surfaces adorn the interior door handles, the glove compartment handle, the radio’s rotary knobs, the knobs of the automatic air conditioning system, the iDrive controller, and the ornamental trim strips featured on the sport steering wheel.

Technical features

BMW 1 Series ConvertibleTechnical highlights include Dynamic Stability Control (DSC) and Dynamic Traction Control (DTC), which can be disabled.

The Active Steering (a variable ratio steering system) is available as an option.

Among the safety features is a roll-over sensor, which monitors the vertical and horizontal movements of the vehicle. 

As soon as the sensors register the danger of the vehicle rolling over, two roll bars are extended in fractions of a second from their storage areas behind the rear headrests. 

Further roll-over protection is offered by the stiffened A pillars and windshield frame.

(Source: BMW)

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