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 |  Nov 15 2010, 8:05 AM

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In the buildup to the launch of Lamborghini‘s new supercar and successor to the Murcielago, the Italian automaker has announced details of an all-new 6.5-liter V12 engine that will power the beast.

While the current top-level Murcielago models, like the SuperVeloce, make use of a V12 engine with the same displacement, that powerplant is a version of the 6.2-liter that debuted in the Murcielago. The all-new engine is made of aluminum-silicon alloy and is lighter, with considerably reduced piston speeds even at a 11.8:1 compression ratio. (In other words, Lamborghini has protected the engine for similar expansion). Debuting in the next Murcielago, the V12 will make 700-hp at 8250 rpm, while 509 ft-lbs of torque is available at 5500 rpm.

Possibly more impressive, Lamborghini has announced a new ISR (Independent Shifting Rods) 7-speed transmission. Rather than opt for the dual-clutch setup becoming popular among other automakers, the ISR is a single clutch unit and will deliver shift times up to half the speed of a dual-clutch setup. Lamborghini also claims that at 154 lbs., the transmission is far lighter than a dual-clutch version and is also more compact. The transmission is able to shift so quickly (40 percent quicker than the E-gear setup in the Gallardo) because rather than having several gears and one shift rod to engage them, there’s a shift rod for each gear, allowing one gear to be engaging as the other one is letting off. The transmission will come with three modes: Strada (automatic), Sport and Corsa.

Lamborghini is expected to debut the new transmission in its successor to the Murcielago at the Geneva Auto Show this coming March and is likely to have the new engine/transmission on hand at the LA Auto Show later this week.

GALLERY: New Lamborghini 6.5L V12

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Official release after the jump:

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