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BMW 760Li Review

February 2005
Filed under: BMW Car News | BMW Headlines

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It has been barely a year since BMW's "New 7" was introduced, but what an eventful year for BMW. No mere evolutionary product, The New 7 was instead a bold statement about who BMW is, what BMW stands for, and where BMW intends to go. "With help from its suppliers," stated no less august a source than Automotive Engineering International in its March '02 issue, "BMW has produced a vehicle that blazes the engineering trail with innovations that will influence passenger vehicles for years to come. The new BMW 7 Series was selected by the readers and editors of AEI as Best Engineered Vehicle for 2002 because it points the way not only for luxury/performance sedans but also for other vehicle segments."

Heart of the 760Li: A new V-12 engine of dazzling technology and performance


As BMW had offered a 12-cylinder model in the previous 7 Series, the 750iL, it was natural and expected that a 12-cylinder version of the new Series would in time make its debut.

The 750iL, offered through 2001, was powered by a V-12 of 5.4 liters with single overhead camshafts and 2 valves per cylinder; that engine's output was 326 horsepower - a figure now matched by the 7 Series' V-8. The V-12 powering the new 760Li is completely new, with 6.0 liters of displacement, dual overhead camshafts (per cylinder bank) and 4 valves per cylinder. Designated N73, it is also related to the N62 V-8 engine that powers the two 745 models, in that the two engines share key technologies and overall engineering architecture; yet it also introduces groundbreaking new technologies of its own.

The V-12 configuration has long been recognized as an ultimate power plant concept, suited for top-class vehicles. Its physics are ideal: 12 cylinders arranged in a 60° "vee" of two cylinder banks are perfectly balanced; combined with the relatively even power pulses of so many cylinders, this results in a supremely smooth propulsion unit.

This V-12 is also a supremely powerful unit, delivering a monumental 438 horsepower and 444 lb-ft. of torque; for perspective, compare this to the 325 hp and 330 lb-ft. that give the 745i its 0-60-mph capability of 5.9 seconds and you can easily envision the performance potential of the V-12!

Let's take a look now at the most significant new technology in this new engine: direct fuel injection. Indeed, this is the first direct-injected gasoline
V-12 engine ever offered in a production automobile, and the first direct-injected gasoline engine to meet contemporary expectations regarding emission control.

Direct fuel injection means injection of the fuel directly into the combustion chamber, rather into the intake port as is the norm; it has been chosen and developed by BMW's power train engineers to boost power output and fuel efficiency to higher levels than could be achieved with conventional fuel injection. BMW's system operates on a stoichiometrically optimum fuel-air mixture (( = 1) and can be emission-controlled by conventional, proven 3-way catalyst technology. By contrast, other direct-injection concepts currently under development in the auto industry (such as lean-burn or stratified-charge) can achieve greater fuel-efficiency gains than the concept chosen by BMW, but these depend on unproven "deNOx" catalyst technology and require sulfur-free fuel, which is not universally available. Thus BMW has deployed a technology that is actually usable in the real world at present.

Product highlights


General
• New top model in 7 Series, BMW’s line of large luxury-performance sedans; successor to 750iL model of predecessor 7 Series
• Shares 123.2-in. wheelbase and overall dimensions with long-wheelbase 745Li model
• Powered by all-new V-12 engine
• Lavishly equipped throughout, with virtually all features that are optional on 745i and 745Li models included as standard equipment

Performance & efficiency
• DOHC (4-cam) 48-valve V-12 engine: 6.0 liters, 438 hp, 444 lb-ft. torque. Engineering features include –
• Direct fuel injection (first direct-injected gasoline V-12 ever offered)
• Valvetronic system of variable valve lift
• Double VANOS variable valve timing
• 0-60 mph in 5.4 sec.
• New STEPTRONIC version of 7 Series’ 6-speed automatic transmission

Handling, ride & braking
• All advanced chassis features of existing 745i/Li models, plus –
• Standard Electronic Damping Control
• Standard self-leveling rear suspension
• Standard 19-in. Star-Spoke Forged-alloy wheels, optional 18-in. wheels
• Available run-flat tires

Exterior & aerodynamics
Compared to 745Li model –
• Wider grille surrounds
• “V12” logo on the front side panels
• Distinctive wheel designs

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