Previewed back in August as and officially unveiled at the 2008 Paris Motor Show, the RC HYmotion4 Concept
is a dynamic four-door coupé focused on performace and environment friendly features.
The hybrid powertrain includes a 1.6 litre THP engine
which is fitted at the rear and a 70 kW electric motor under the hood.
The units are coupled with an electronically-controlled six-speed manual
gearbox and can be combined in different ways, including an all-wheel drive driving mode.
The performance figures are a maximum power of 230 kW
(313 bhp), a 0 to 100 km/h sprint in 4.4 seconds and CO2 emissions in the combined cycle
of only 109 g/km, or zero in electric only drive mode.
Among the technical highlights are the carbon body, mounted on an aluminum spaceframe, special double aluminium wishbones suspension and an optimized aerodynamic, with a Cx value of 0.25.
The driver’s seat
is placed as far forward as possible, thereby benefiting available space for four potential passengers.
The sense of motion begins at the very front of the vehicle,
where the Lion badge is framed by air intakes.
The character is enhanced by the headlamps,
designed with Peugeot’s stylistic genes in mind, and enhanced by the use of LED technology.
These headlamps are the starting point of a waist line which lends structure to the car’s overall dynamic and
flowing profile, supporting the plunging window line and
highlighting the muscular design of the wings.
The rear lights are contained within this area and also
make a passing reference to the manufacturer’s
long history, the 504 coupé and cabriolet from 1969,
the 307 CC, and now the 308 CC.
The double glass roof is crossed by
lines originating on the hood which merge into the
Naca unit at the rear of the roof and end finally in an
embossed area on the boot encircling the rear logo.
Under the hood is also a 70 kW (95 bhp) electric motor, powered by “lithium-ion” batteries and is recharged
by an energy recovery system which operates during
both deceleration and braking.
The batteries are ideally
positioned in the central “transmission” tunnel running
through the passenger compartment.
With no mechanical connections between the
front and the rear power units, the system is controlled
entirely and automatically by electronics using by-wire technology as used for the first time on the Hoggar, the
concept car which appeared in 2003 and was equipped
at the time with two HDi FAP diesel engines.
The RC HYmotion4 can thus be driven in different ways:
- in electric only mode (to start up, in town at low speed and when decelerating),
- in gasoline engine only mode, at constant speeds on the open road or on motorways, when the engine can achieve its optimal effi ciency,
- with both engines combined: during phases of acceleration for extra power
(“boost” function), with a maximum power of
160+70=230 kW (≈ 313 bhp) and a maximum torque
of 178 Nm at the front and 280 Nm at the rear
An additional benefit provided by the vehicle’s
architecture is the optimal front and rear weight distribution,
with minimal weight in both the front and rear overhangs.
Among the features are the high quality materials
(leather, aluminium, chrome, carbon) and the four low-slung
The very “aeronautical” design of the fascia panel helps
give the interior space a modern feel, with a finish
consisting of two horizontal sections.
Between the latter,
numerous items of equipment are housed on a uniform
black-lacquered background: digital displays in front of the driver (for instrumentation and visual feedback
from the rear view cameras) and in front of the passenger
(for leisure activities).
In another original stylistic feature, the central“transmission” tunnel continues onto the roof, in the
manner of a “scorpion’s tail”, making a passing reference
to the RC ♠ and ◆ concept cars.
This feature can be back-lit, as can the digital readouts
on the fascia panel, to create an original ambience which
can be personalised according to the mood of
Structure and suspension
Its structure thus comprises an aluminium space-frame ensuring overall
lightness and rigidity, to which are fitted the mechanical
assemblies and the suspension.
The suspension consists of double aluminium wishbones at
the front and at the rear.
The system uses a particularly
innovative technology known as “kineticTM H2 CES”.
This system, developed by the company TENNECO,
allows a very high level of road holding with no adverse
effect on comfort.
The principle is to control body roll
and damping functions by means of a hydraulic link
between the right and left-hand shock absorbers.
system, which avoids the need for an anti-roll bar, ensures
the car remains flat when cornering while at the same
time providing excellent vibration fi ltration.
Brake system includes four ventilated brake
discs, with the front electric motor
which recovers energy in order to recharge the
The wheels are fitted with Michelin
225/45 R19 tyres. A system of carbon wheel “discs” improves the vehicle’s
penetration through the air by covering and streamlining
each wheel, while at the same time preserving their
The HYmotion4 has an aerodynamic Cx value
of 0.24 and an SCx of 0.494. Air flows have been
modelled in the wind tunnel to ensure
the necessary cooling capacity for both engines.
The four-part front air intake overcomes the problem
of heat build up in relation to the lithium-ion batteries: the extraction of the internal flow taking place
upstream of the front wheels.
These air intakes are controlled by a system
of movable flaps. Additional devices include the flat undefloor and the rear diffuser.
Cooling of the gasoline engine and its two intercoolers
is by means of two side air intakes and the Naca
unit located at the rear of the roof. Air is then extracted
via two recesses in the lower rear panel.
This carefully designed aerodynamic also
avoids the need for a spoiler, thereby enhancing the car’s