Porsche 911 Turbo User Handbook Manual page 6

The first Porsche racing car to following season, the 917/30,
feature turbocharged power developing 1,100 horsepower from
made its debut in the early 1970s. a 5.4-litre unit, became the most
The 12-cylinder engine in the powerful racing Porsche of all
legendary 917 used a twin-turbo time.
system to achieve a colossal
1,000 horsepower. In 1972, the This invaluable race experience
917/10 with 5-litre turbo engine inevitably found its way into our
claimed the North American production road car development.
CanAm championship. In the The first 911 Turbo was unveiled
to the world in 1974. Developed in
the midst of a global oil crisis, it
was a homologation model for FIA
Group 4 racing. The maximum
boost pressure available from the
turbo was restricted for normal
road use. Originally conceived as
a limited edition of 400 examples,
it was the start of the Turbo
legend.
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Maximum torque output of
343 Nm was unprecedented in a
3-litre engine. This exceptional
performance necessitated a new
gearbox design featuring specially
reinforced gears.
The second 911 Turbo, launched
in 1977, developed 300 bhp
from a 3.3-litre intercooled engine.
Brake performance was similarly
enhanced, combining four-piston
aluminium fixed calipers with
cross-drilled discs.
In 1987, the 911 Turbo was joined
911 Turbo 3.0 (1974), 911 Turbo (2006)
by the 911 Turbo Cabriolet and
This original model featured 911 Turbo Targa.
widened wheel arches as well as
specially developed front and At that time, opinion was divided
rear spoilers. These major aero- on the necessity of an open-top
dynamic refinements were model. For the majority of people,
essential requirements given the the 911 Turbo was a road-going
increased engine performance. racing car, which meant a fixed
Producing 260 bhp, the first metal roof was essential. Strange,
911 Turbo could reach 100 km/h how opinions change. After both
(62 mph) in as little as 5.5 seconds. models were discontinued in
911 Turbo |
1989, there was a 14-year wait
until the next 911 Turbo Cabriolet.
In 1993, we launched the last
911 Turbo with dedicated rear-wheel
drive. Based on the Type 964
platform, it used a 3.6-litre engine
to produce 360 bhp. Its Type 993
successor, launched in 1995,
set a range of new benchmarks in
supercar performance. All-wheel
drive ensured greater active
safety as well as better driving
dynamics. The power distribution
had a rear-axle bias that retained
the familiar Porsche handling
characteristics. Twin exhaust turbo-
chargers offered better response
and a more harmonious build-up
of power. The last 911 Turbo to
feature an aircooled engine, it
offered maximum output of 408 bhp
from a 3.6-litre displacement.
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The 911 Turbo