Lamborghini Murciélago Roadster LP640

Production Cars 5 Dec 2006
Lamborghini Murciélago Roadster LP640

At the 2006 Los Angeles Auto Show Lamborghini is unveiling the new version of the Lamborghini Murciélago Roadster. The Lamborghini Murciélago LP640 Roadster benefits from the same extensive modifications to the bodywork and mechanics as the LP640 Coupé.


From the official Press Release:

Design

Lamborghini Murciélago Roadster LP640

In their re-interpretation of the Roadster, the designers of the Lamborghini Centro Stile have remained true to the original style principles of purism, sportiness and functionality. As with the Coupé it has now assumed a more aggressive appearance, a substantial influence being the new front and rear bumpers.

On the latter there is a new rear diffuser, in which the exhaust system is integrated within a tailpipe. The rear lights are also new. The design of the sides is asymmetrical: whilst the area behind the air inlet on the right is almost closed, on the left there is a large opening for the ventilation of the oil cooler.

Changes to the rear-view mirror make the Murciélago Roadster more aerodynamic, with other features including new windscreen wipers and the option of new Hermera alloy wheels.

Interior

Lamborghini Murciélago Roadster LP640

From its forerunner, the Lamborghini Murciélago Roadster LP640 has inherited the characteristic asymmetrical interior arrangement.

The whole interior is tailored to the driver and arranged in such a way that a true driver-focused experience is offered; a car which challenges yet at the same time is entirely geared to the driver. This is illustrated in the use of perforated leather for the chair cushions, the dashboard tunnel console and the door lining on the driver’s side.

The instrument panel has also been redesigned with different display graphics. This includes a new Kenwood car radio with a 6.5 inch widescreen monitor and reader for DVD, MP3 and WMA. The navigation system is also available as an option.

Like its predecessor, the Murciélago LP640 Roadster can be customised through special equipment packages. The ‘ad personam’ individualisation program offers even more scope to create a personal, unmistakeably individual sports car.

Technical features

Lamborghini Murciélago Roadster LP640

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 in 3.4 seconds making it 0.4 seconds faster than its forerunner.

The engineers also focused their attention on optimising the torque band. The driveability of the engine thus benefits from the use of a continually variable timing system (intake and exhaust side) and engine management with Drive-by-Wire-System.

Lamborghini Murciélago Roadster LP640

In order to meet the increased thermal requirements of the engine, the engineers built a larger oil cooler. On the exterior this is illustrated by a larger air inlet on the left wing of the vehicle.

The liquid cooler on the other hand remains unchanged with the Lamborghini VASC System (variable geometry air inlet system). Additional electronically controlled air scoops open according to the outside temperature and cool air requirement. This guarantees maximum aerodynamic efficiency.

The six-gear transmission was adapted to the higher performance and torque, and is combined with a stronger rear differential and new half-axles. An e-gear transmission with a newly tuned thrust mode (acceleration program) is also available as an option.

Lamborghini Murciélago Roadster LP640

Like its forerunner, the new Murciélago Roadster LP640 has permanent four-wheel drive, based on Lamborghini’s VT-system (Viscous Traction), which is self-regulating without the
aid of electronic controls. In standard cases the drive force is distributed between the front and rear axles at a ratio of 30 to 70.

An independent control loop adjusts the distribution of the drive force depending on dynamic oscillation, weight distribution and the relative friction values in synchronisation with the Visco clutch. In extreme cases, up to 100 percent of the drive force can thus be applied to one axle.

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 GFA (Gestione Funzioni Ausiliarie, i.e. Auxiliary Function Control) control unit and a PMC (Power Motor Control, i.e. slave unit). These control units are interconnected by means of a CAN bus.

Frame and chassis

The Lamborghini Murciélago Roadster LP640 features a 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. This optically distinctive reinforcement can also be delivered in carbon fibre on request. Without impairing the extreme character of a typical roadster, a canvas roof (R.top) can be fitted which, true to the design tradition of this type of vehicle, is principally conceived for temporary use (for example in a sudden shower of rain) and for speeds of up to 160 km/h.

Lamborghini Murciélago Roadster LP640

With its characteristic wing doors, the bodywork of the Murciélago LP640 Roadster is still made from an extremely high quality combined structure of sheet steel and carbon honeycomb. The combination of these materials is achieved by bonding and riveting.

The road performance, handling and stability at high speeds benefit from the use of new springs and stabilisers as well as the revising of the electronically controlled silencers. The anti-dive and anti-squat properties of the axles which effectively prevent brake diving and squatting, remain

unchanged. The springs (two for each rear wheel and one for each front wheel) and silencers are coaxially aligned.

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.

Safety

The braking system features internally ventilated disks that 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.

When extremely high performance braking is required it is possible to equip the vehicle with carbon ceramic brakes measuring 380 mm x 36 mm with six-piston-brake callipers, which reduce pressure on the brake pedal and shorten the braking distance.

Passive safety is enhanced by 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.

(Source: Lamborghini)

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