Internally known as model “LB834,” the Aventador’s one-piece passenger cell is made entirely of a new-generation reinforced carbon fiber formulated with help from Boeing Aerospace, and it weighs in at just 324 pounds, while the whole naked chassis including aluminum front and rear crash structures weighs just 505 lbs. Overall bending and twisting stiffness is said to be double that ever experienced with the Murcièlago. Every carbon fiber cell is created in a just-completed facility at Lambo HQ in Sant’Agata Bolognese, and between 700 and 800 units per year is the ultimate goal once the full-rhythm build starts after the August summer holidays when Italy traditionally shuts down. The best year for the Murc was 2007, when 613 were delivered worldwide.
The new 691-hp (SAE), 6.5-litre V12 engine out back – called “L539″ in Lambo-speak – is a massive 40 lbs. lighter than the Murcièlago engine, sits 2.8 inches lower in the chassis, is nine percent more powerful, and produces upwards of 20 percent better fuel efficiency in the hands of the right driver (for a whopping 13.7 mpg average). Dry weight of an Aventador is now just 3,472 lbs. compared to the Murcièlago’s 3,671 lbs., a healthy five percent reduction in a class segment where weight loss is a crucial and constant challenge. Weight distribution is a predictable 43 percent front and 57 rear.
The current estimated acceleration time for Aventador to 60 mph is 2.8 seconds (i.e. 2.9 to 100 km/h) when dallying in the fields of Launch Control. The engine howls with all power on tap now up to 8,250 rpm, and there’s much more flexibility in the mid-revs with almost all of the 509 pound-feet of torque available from 5,000 rpm and more going on also at the lowest revs.
The new seven-speed ISR (“Independent Shifting Rods”) Graziano single-clutch gearbox is said to polish off shifts in Corsa mode in just 50 milliseconds while weighing half as much as the old E-gear Audi R-tronic-like dual-clutch system. And for the first time on a Lamborghini, the suspension is pulled right out of Formula-car thinking with its sophisticated inboard pushrod spring and damper setup. Top speed realized so far, so they tell us, has gone beyond the stated 217 mph max.
Source : automagazined.com
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