THE LONG DISTANCE LOVE AFFAIR
THE CITROEN CX BROKE NEW GROUND IN
BIG CAR DESIGN WITH ITS AERODYNAMICS,
FRONT WHEEL DRIVE, SELF-
LEVELLING HYDROPNEUMATIC SUSPENSION,
VARI-POWER
STEERING AND POWERED BRAKING.
Even before the energy crisis that made
all makers of big cars take fuel economy seriously,
Citroën introduced the aerodynamic CX.
Its design would be more influential than
any of the revolutionary Citroëns which preceded it.
Its front wheel drive ended the myth that
this was unnecessary or impossible in all but minicars.
The CX put power steering into the hands of
drivers to whom performance and handling are a priority.
Brought the superiority of self-levelling suspension home to
luxury car makers. And would help to inspire experimental
active suspensions now being developed.
The CX's powered braking offered
instantaneous command of enormous stopping power when most
cars had only vacuum-servo brakes.
A LESSON IN ENGINEERING.
Although other manufacturers have adopted
some of the CX's features. none has managed to produce a car
which compares with the CX. In part, this is because most of
the elements that make up the CX design were developed first
by Citroën. Some had already been proven in earlier Citroën
models, giving the company an unmatched lead in these areas.
Indeed, several competitor's cars incorporate components
licensed from or made by Citroën.
The CX brings together all these design
elements in an integrated whole. It has a 'feel' and a
character missing in cars which merely reflect part of its
design. Further, the CX now includes many improvements based
on experience of making these technologies work together.
IN A CLASS APART.AND THE
DIFFERENCE IS ENGINEERING.
Though the CX is often considered
alongside a handful of expensive luxury saloons, the decision
to own a large car should not be a matter of style but of need
- particularly if you cover high mileages annually.
To emphasise this, the CX range includes
models across a wide price range. All models have the inherent
CX qualities, which all underlines that its performance is not
simply a matter of bolt-on additions, nor its comfort for
driver and passengers a matter of additional interior
fitments. They are a product of the car's integrated design
especially the unique hydropneumatic system which gives the CX
a ride quality, handling, and braking widely considered to be
better than any other luxury or performance saloons.
WHEN BIGGER IS BETTER.
The real purpose of the power and heavier
build of large cars like the CX is that high cruising speeds
can be maintained without excessive stress, either on the car
or the occupants.
Aside from offering more space, a benefit
of length is that it usually places occupants within the
wheelbase, reducing the effects on them of any pitching
movement. This is fully exploited in the CX -
minimal overhang front and rear means that most of its length
is wheelbase.
This has a number of effects upon
performance but, as far as comfort is concerned, it means that
passengers, engine and luggage weight are within the
wheelbase, actually reducing the pitching of the can
FRONT WHEEL DRIVE AND
AERODYNAMICS WORKING TOGETHER.
What makes the CX such a great car to
drive is how major design elements are matched to each
other. Obviously with a very low drag coefficient, an
aerodynamic car should be more fuel efficient than a 'boxy'
can. In theory one would expect it to also handle better
at speed. In truth, some aerodynamic-looking cars do not
handle as well. Aerodynamics is a two-edged sword -fuel
efficiency can be achieved, but sometimes this is at the
expense of handling. Because aerodynamic design effects lift
or pressure on the car's body at speed, it must be carefully
matched to weight distribution.
Where fashion dictates 'aerodynamic
styling' a manufacturer may be tempted to restyle a model
aerodynamically while retaining an existing floorpan and
driveline - and, with it, the same weight distribution. The
result could be a car which handles less well than its 'boxy'
predecessor This problem is also likely in an entirely new car
where the need for a range of engine types, can only be met by
switching between four and six cylinder units. Engine space
may then dictate rear wheel drive - with all its shortcomings
in terms of handling, weight and usable interior space. Put
very simply, the benefit to handling of front wheel drive is
that it pulls the car, rather than pushing it from behind. It
also puts more of the engine and transmission's weight towards
the front of the wheelbase where it improves traction and
directional stability.
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