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December 6, 2006 This Week:
© 1998 - 2006
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As with the Coupé the new 6.5 litre (6.496 cm3) 60° V-engine and 640 PS (471 kW) at 8,000 min-1 is now used also in the Lamborghini Murciélago Roadster. At 6,000 min-1 the 12-cylinder engine reaches the maximum torque of 660 Nm. Naturally the Lamborghini Murciélago meets all the current valid European and North American emission standards. The increased power naturally leads to increased road performance. The maximum speed now lies at 330 km/h compared to 320 km/h. The standard sprint from 0 to 100 km/h is now reached by the Murciélago LP640 Roadster in an excellent 3.4 seconds making it 0.4 seconds faster than its forerunner. Higher performance and torque naturally mean increased demand on the drive components. A six-gear transmission adapted to these requirements, plus a stronger rear differential and new half-axles, have therefore been deployed in the new Murciélago Roadster. An e-gear transmission with a newly tuned thrust mode (acceleration program) is also available as an option.
Innovations have also been made to the electronics. With a closed loop control system the revised electronic control units improve the road performance and the response characteristics of the engine. All engine and vehicle parameters are controlled and monitored through a combination of three ‘master’ and one ‘slave’ control units. These are two electronic control units of the Lamborghini LIE type: a Lamborghini GFA (Gestione Funzioni Ausiliarie, i.e. Auxiliary Function Control) control unit and a Lamborghini PMC (Power Motor Control, i.e. slave unit). These control units are interconnected by means of a CAN bus. Although the Lamborghini Murciélago Roadster LP640 is principally based on the Murciélago Coupé, it has further distinguishing features beyond its distinctive appearance. First and foremost, newly designed frame structure parts made of steel and carbon fibre guarantee an unswerving torsion resistance even without a roof. A special reinforcement structure in the engine area makes a major contribution to this aspect.
The new aluminium Hermera rims measure 8 ½” x 18” at the front and 13” x 18” at the rear. The vehicle is equipped with mixed tyres of the type PIRELLI P Zero “ROSSO”: the Murciélago LP640 Roadster is driven at the front on tyres with the dimensions 245/35 ZR 18 and 335/30 ZR 18 at the rear. Pirelli P Zero Corsa tyres are available as an option: particularly appropriate for use on race tracks. Its hydraulic dual circuit braking system with LP-brake servo (unit) ensures impressive delay values under even the hardest strain. The internally ventilated brake disks measure 380 mm x 34 mm at the front and 355 mm x 32 mm at the rear. The closed loop of the four-channel anti-lock braking system (ABS) is enhanced, with electronic braking management (DRP) and traction control (TCS). The system consists of an electro-hydraulic control unit and four sensors for the wheel speeds. The new Murciélago LP640 Roadster meets rigorous standards in terms of passive safety. With two front-seat air bags, a 60-litre airbag on the driver’s side and a 130-litre airbag on the passenger side, it meets all existing world-wide standards in the event of head-on and side crashes, impact against poles, occupant safety in the case of accident, fuel supply integrity and fuel combustibility. The luggage compartment also complies with childproof safety regulations. The Murciélago LP640 Roadster has automatically lowered roll bars; if the electronic control of this device detects a critical situation, the roll bars shoot out behind the seats within just a few milliseconds. (December 01, 2006)
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