Cadillac officials say
the Cien concept “symbolizes Cadillac’s 2002 centennial celebration”
because cien is Spanish for 100.
The Cien’s styling and
construction—using carbon fiber, composites and aluminum—is striking in
the same way that the U.S. military’s Stealth aircraft is. The two doors
open like scissors, pivoting at the base of the windshield pillars.
Setting off the unique look is blue-tinted glass like that used in
The Cien's 7.5-liter V12
concept powerplant, visible through the car's rear window, generates a
whopping 750 horsepower and 450 lb-ft of torque, yet meets the packaging
requirements and fuel economy standards of a V8.
"The packaging was probably the biggest challenge we faced, because from
the outset we wanted to fit the V12 inside the package of a V8," said
Steve Kowalk, GM Powertrain project manager for the Northstar XV12. "We
focused on keeping the size down to fit as many different types of
vehicles as possible, while maximizing displacement, and then using
Displacement on Demand (DOD) to deliver the required power at all times.
We also minimized cylinder bore wall thickness to 7 millimeters and used
a rear cam drive to create a more compact package and enable a lower
Engine Like No Other
It’s called the
Northstar XV12 concept engine because the all-aluminum, double overhead
cam, four-valve V12 uses Northstar structure. But advancements include
General Motors Corp.'s DOD technology, which allows the engine to run on
six cylinders at times to maximize fuel savings.
Another notable feature:
The Northstar XV12 is designed for 36,000-mile oil-change intervals.
It’s accomplished by using improved oil sensors and monitors, reducing
oil consumption, improved oil cooling and a larger oil sump capacity.
The powerplant is mated
to a semi-automatic transmission with racing-style, electronic paddle