Audi has finally released its long-wheelbase 2011 A8 L next week at the 2010 Beijing Auto Show. Both the standard- and long-wheelbase models share a variety of hardware, including a standard 372-horsepower 4.2-liter FSI V8, eight-speed Tiptronic automatic transmission and Quattro all-wheel drive. Top speed will be electronically limited to 155 mph. The standard setup includes an adaptive air suspension and 19-inch wheels and tires. Among the optional rear-seat amenities are an entertainment system, a full-length console with separate controls for the four-zone automatic air-conditioning, a refrigerator, a folding table and a massaging/reclining seat with power-adjustable footrest.
"The quality of workmanship in the Audi A8 L is simply first-class – from the restrained ambient lighting through the accurately fitted switches with their precise click action. Fascinating aspects of the car's interior are the slim, clear outlines and the stylish materials with their modern look."
"Each of the W12 engine's aluminum cylinder heads contains two camshafts; these can be repositioned hydraulically by an amount equivalent to 52 degrees of crankshaft rotation. Altogether, the four camshafts operate 48 valves by way of low-friction roller cam followers, and are themselves driven by chains from an intermediate shaft."
"For use in the long-wheelbase A8, Audi's engineers have converted the W12 engine to FSI gasoline direct injection. This involved considerable modifications to the cylinder heads. Fuel is injected into the combustion chambers at a pressure of up to 130 bar. A high 11.8:1 compression ratio boosts power output and efficiency. The inlet ports are specially shaped to impart swirl to the incoming airflow and make combustion more efficient."
