The new Fiat 500 comes with a
choice of three engines combined with 5 or 6 speed
mechanical gearboxes (a Dualogic
sequential robotised 5-speed gearbox will be
available at a later date for the petrol engines).
There are two petrol units,
the 69 bhp 1.2 and the 100 bhp 1.4 from the Fire
family that boasts a total output of over ten million
engines to date. The third is the 75 bhp 1.3 16v
Multijet with DPF, the best the market can offer in
terms of small turbodiesels, of which over two million
have been built so far.
All the engines in the Fiat 500 are
Euro 4-compliant and designed to meet the future
European standards (Euro 5), and they already meet the
emissions limits that will presumably be enforced in
2009. The 1.3 Multijet is also equipped with a
particulate trap (PDF) as standard equipment.
Fire 1.2 8v engine has been made more
reliable. The coils have been mounted
closer together in a single block.
new type of coil means less spark plug
wear, more energy available to ignite
each plug thanks to the elimination of
the lost spark, better cold starting
due to the additional energy available
for the spark plug (more energy
supplied by the coil and no losses
caused by the transfer of high voltage
due to the adoption of very short
cables), and finally, a significant
reduction in the risk of disturbance
to the onboard instruments due to high
Fire 1.2 8v: The 1242
cc engine has undergone a series of refinements to
enhance its economy. It delivers 51 kW (69 bhp) at
5500 rpm, and peak torque of 102 Nm (10.4 kgm) at 3000
rpm, with a top speed of 160 km/h. Fuel consumption is
5.1 l/100 km in the combined cycle, with CO2
emissions of 119 g/km. Acceleration over 100 metres is
at 12.9 seconds.
The engine features an electronic
throttle valve control system known as ‘drive by
wire’ (with no mechanical connection between the
accelerator and the throttle), and the electronic
control unit delivers the torque on the basis of the
driver’s demands (torque-based system).
A continuous variable cam phaser
allows a substantial part of the exhaust gases (about
25%) to be recirculated in the combustion chamber,
significantly reducing fuel consumption and exhaust
emissions when driving with a partial load.
The timing components have been
made lighter and the valve springs are of the low load
type, to reduce friction.
Another interesting feature of this
engine is the use of an active knock sensor capable of
managing the advance in the best possible way in all
conditions, in addition to the multipoint sequential
phased injection system by Magneti Marelli.
Fire 1.4 16v: This
engine has a capacity of 1368 cc in four inline
cylinders, with a bore of 72 mm and stroke of 84 mm.
There are four valves per cylinder, driven directly by
the overhead camshaft. It delivers a maximum of 73.5
kW (100 bhp) at 6000 rpm and peak torque of 131 Nm at
4250 rpm. Top speed is 182 km/h, and acceleration from
0 to 100 km/h is withing 10.5 seconds. It has an
electronic throttle valve control (drive by wire) and
features timing components that have been made
lighter, an increased compression ratio with a
combined cycle returning 6.3 l/100 km.
To guarantee low emissions, special
injectors have been adopted that optimise the spray
phase, thus reducing the quantity of petrol that
adheres to the walls of the intake manifold during
cold starting and in transients (when you depress the
accelerator). This reduces the quantity of
hydrocarbons in the exhaust.
1.3 Multijet 16v turbo diesel:
Fitted with a Borg-Warner fixed geometry turbo (of the
waste-gate type) with an intercooler, this diesel
engine delivers up to 75 bhp (55 kW at 4000 rpm) and
torque of 145 Nm at 1500 rpm. With this engine, the
Fiat 500 has a top speed of 165 km/h and accelerates
from 0 to 100 km/h in 12.5 seconds. Fuel consumption
is 5.3 l/100 km in the urban cycle, 3.6 l/100 km out
of town and 4.2 l/100 km in the combined cycle, and CO2
emissions are at just 111 g/km.
The engine is a straight-4 with a
capacity of 1248 cc, a bore of 69.6 mm and a ‘long’
stroke of 82 mm. The 16 valves are governed directly
by a twin overhead camshaft with maintenance-free
hydraulic tappets and automatic play take-up. With all
its accessories, the 1.3 Multijet 16v weighs just 130
kg, is just 50 cm long and 65 cm tall. It was designed
to travel 250,000 km without needing any maintenance
to the mechanical components.
The compact engine is also
eco-friendly, thanks to an emissions control system
with an EGR valve (EGR stands for recirculating
exhaust gas) triggered electronically and managed
directly by the engine control system, a heat
exchanger to cool the recirculating exhaust gas and a
‘close coupled’ catalytic converter. A particulate
trap (DPF), the ‘for life’ system that abates fine
dust and does not need additives to be regenerated, is