The Lamborghini Murcielago’s engine - which complies with the strictest emission standards in the world, including those of the United States, Japan and Europe - is a 12-cylinder V12 with a displacement of 6192 cc, made entirely from aluminium alloy and designed for unleaded fuel, producing 580 HP at 7500 rpm and 48- lbs-ft torque at 5400 rpm. Torque delivery is optimised across the entire engine operating band (even at engine speeds relatively low for a sports car) thanks to the adoption of a variable-geometry intake system (VIS), variable valve timing (VVT) on both inlet and exhaust camshafts, and the "drive-by-wire" electronic throttle control, which makes for reduced emissions, improved idle speed control and improved driveability. Particularly noteworthy is the fact that at just 2000 rpm, the Murcielago produces more torque than maximum value attained by the majority of Granturismo cars in today’s market.