Porsche 911 Turbo User Handbook Manual page 7

Two models.
One unmistakable purpose.
For over 30 years, the 911 Turbo More power, less weight.
has established itself not just as
an icon, but as an iconoclast: Each While the engine's horizontally
generation has crushed old beliefs opposed boxer layout and
about the limits of sports-car 3.6-liter displacement remain
performance. The 911 Turbo and intact, power output has been
911 Turbo Cabriolet continue this markedly improved to the tune of
time-honored tradition into a sixth 480 horsepower at 6000 rpm—
generation. Their unprecedented 60 horsepower more than that
acceleration and handling dynamics, of the previous generation of
together with heightened levels of 911 Turbo. A significant increase
comfort and poise, coalesce in torque is also present, with
into the ultimate sports car— 460 lb.-ft. on tap from 1950 rpm
and the next masterpiece of all the way up to 5000 rpm with
Porsche engineering. no drop-off.
Even more thrilling, this increased
power is delivered in a lighter
package. Aluminum doors and an
aluminum trunk lid exemplify the
extensive use of weight-saving
materials and construction
techniques that help these models
shed 11 pounds of weight, giving
the Coupe an impressive power-to-
weight ratio of 7.28 lbs./hp. The
new 911 Turbo Cabriolet sports
an equally impressive 7.6 lbs./hp
ratio. The payoff? Zero to 60 mph
in 3.7/3.8 seconds (Coupe/
Cabriolet) with a manual gearbox.
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Equipped with the Tiptronic S A revolution in turbo technology.
transmission, the 0–60 mph
Coupe acceleration time is 3.4 To achieve these new benchmarks,
seconds and the Cabriolet time Porsche created Variable Turbine
is 3.5 seconds. On the track, the Geometry (VTG). Traditionally,
124-mph benchmark is eclipsed optimal turbocharging has been
by the Tiptronic S Coupe in a mere an exercise in compromise. At low
12.2 seconds; 12.5 seconds with engine speeds, a small turbine
a manual transmission. The Cabriolet accelerates more quickly due to
records 12.6 seconds for the its low mass. A large turbocharger
Tiptronic S and 12.8 seconds excels at higher engine speeds by
for the manual transmission. creating less back pressure. By
adjusting the turbine vanes inside
each of the engine's twin turbo-
The 911 Turbo I An Overview
chargers, VTG creates the optimal
profile as engine speed rises or falls.
In effect, a large turbo is made to
mimic the profile of a smaller turbo
at low engine speeds. At higher
speeds, the profile is increased.
Variable Turbine Geometry offers
a range of performance benefits,
including higher torque at low engine
speeds, greater top-end power, and
optimal torque output over a
broader range of engine speeds.
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