The 2005 Cadillac Cien Concept car is a two-seat car with a new design and and new power in a mid-engine. The Cien is powered with a V-12 engine which is the technology flagship for General Motors.
Cadillac Cien's 7.5-liter, V-12 powerplant, which is visible through the car's rear window, is a fresh concept engine from GM Powertrain dubbed the Northstar XV12. The all-aluminum, double overhead cam (DOHC) four-valve V-12 engine generates 750 horsepower and 450 lb.-ft. of torque, yet it meets the packaging requirements and fuel economy standards of a V-8.
The Northstar XV12 concept engine features several technological advancements over today's V-8 engines including GM's Displacement on Demand technology, which allows the engine to run seamlessly on six cylinders at times to maximize fuel savings. The engine also uses a direct injection gasoline combustion system for increased engine power, improved fuel economy and reduced emissions. The Cien includes a combined starter generator for quicker, quieter starts
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