While we await the publication of the other two episodes on the MultiAir engine, our Team will try answering the
many requests for clarification that emerged last week.

Please consult the following table which summarizes the technical features of the
MiTo 1.4 TB 135 HP.
Emissions, consumption, performance and much more: get a more in-depth view.

What are you waiting for? Tell us what you think!



 

Alfa Romeo MiTo 1.4 TB 135 HP - Technical features

cylinders, alignment
4

Bore x stroke (mm)
72x84

Displacement (cm3)
1368

Compression ratio
9,8:1

Maximum power kW (hp - EC) at rpm (NORMAL)
99 (135) 5000

Max. power kW (hp - EC) at rpm (SPORT)
99 (135) 5250

Max. torque Nm (kgm - EC) at rpm (NORMAL)   
180 (18,3) 1750

Maximum torque Nm (kgm - EC) at rpm (SPORT)   
206 (21) 1750

Timing system (control)   
Toothed belt with hydraulic tappets and Mair system on aspiration side

Fuel delivery   
Supercharged through exhaust-driven turbo-compressor with variable valve actuation for managing engine load

Injection system   
Electronic, phased sequential injection with detonation control and variable valve actuation

Stop&Start device   
Stop&Start system for automatically shutting down/restarting the engine in the event of short idle phases during the urban cycle. This system optimises consumption and CO2 emissions.

Battery: capacity(Ah) / Generator (A)   
63Ah/450

Traction   
Front

Gears
5 + R

Final drive ratio 
3,733

Basic commercial type   
195/55 R16

Steering box
Rack and pinion assembly with electric servo-drive on column

Curb to curb turning diameter (m)
11,25

Front   
Mc Pherson

Rear   
Torsion bar

Front (mm)
281

Rear (mm)
251

Fuel tank capacity (litres)
45

Weight in running order DIN (kg)
1135

Max. towable weight (kg)
500

Max. speed (km/h)
207

Acceleration (1 person + 30 kg) 0-100 km/h (s)   
8,4

Consumption (l/100 km) - urban driving cycle   
7,4

Extra-urban driving cycle   
4,5

Combined driving cycle   
5,6

CO2 emissions (g/km)   
129

Servicing   
30,000 km

Energy class   
Euro 5

Acceleration in 1st gear from 60 to 100 km/h   
- 5% VS T-jet

Acceleration in top gear from 80 to 120 km/h   
- 6% VS T-jet

Welcome to part two of the MultiAir propulsion system where we explain how the new system works.
Today’s video features Massimo Fulfaro, one of FPT’s (Fiat Powertrain Technologies) development engineers. He’ll be showing you all the technical details using an example engine.

Yet another opportunity to learn all about this incredibly innovative technology which has been under development since the early 90s and is destined to fit under the bonnet of the Alfa Romeo MiTo for many years to come.

How it works

Getting get down to the technical details of the MultiAir engine, the key to this system is its intake valves.

A piston driven by a mechanical intake cam is connected to the intake valve through a hydraulic chamber, which is controlled by a normally open on/off solenoid valve.

When the solenoid valve is closed, the oil in the hydraulic chamber acts as a solid body and transmits to the intake valves the lift schedule imposed by the mechanical intake cam.

When the solenoid valve is open, the hydraulic chamber and the intake valves are de-coupled; the intake valves no longer follow the intake cam and close under the valve spring action.

The final part of the valve closing stroke is controlled by a dedicated hydraulic brake, to ensure soft, regular landing in any engine operating conditions.

This controlled solenoid valve opening and closing system makes it possible to obtain a wide range of different optimum opening schedules for the intake valves.

At full load

The solenoid opens near the end of the cam profile, causing early intake valve closing, thus maximising the mass of air trapped in the cylinders.

At part-load

The solenoid valve is opened earlier, controlling the air mass in proportion to the required torque.
Alternatively, the intake valves can be partially opened by closing the solenoid valve once the mechanical cam action has already started. In this case the air stream into the cylinder is faster and results in higher in-cylinder turbulence. The last two actuation modes can be combined in the same intake stroke, generating a so-called “Multilift” mode, that enhances turbulence and combustion rate at very low loads and RPM speeds.

Advantage

• Increases maximum power by 10% compared to a traditional engine of the same cylinder size.
• Increases torque by 15% at low RPM and during transients, thanks to the highly advanced strategies used to control the engine functioning parameters.
• Over 10% reduction in consumption achieved by the elimination of pumping losses and the precise calibration of combustion optimization parameters. Paired with MultiAir technology, the MiTo introduces the innovative Start&Stop system that switches off the engine automatically while waiting at a traffic light yet keeping the vehicle’s systems fully functional to guarantee the total comfort of the occupants.
• Reduction in harmful emissions (40% for HC/CO and 60% for NOx) in the warm-up phase made possible by the optimised valve control strategies during intake stroke and by the internal exhaust gas recirculation system.
• Faster accelerator response thanks to the constant air pressure upstream of the cylinders combined with extremely rapid intake valve control.

On July 3rd, 4th and 5th, Alfa Romeo was at Goodwood for the Festival of Speed.

We can almost hear the roar of those legendary models, the P2 Grand Prix, the 8C 2300 Le Mans,  Fangio’s 6C 3000 CM, the Carabo and the 33TT 12, as they set off from the Arese Alfa Romeo Museum bound for England.

Stars of the show at some of the festival events were the Carabo in the Cartier ‘Style et Luxe’ competition and the 33 TT 12 , driven by Arturo Merzario, the car that clinched the 1975 World Manufacturers’ title on the Goodwood circuit.

All the cars, except the Carabo, were on show in the Alfa Romeo pavilion, a feast for the eyes of all those avid Alfa fans.

A maplog was set up for this thrilling event, an innovative project that made it possible to follow all the Alfa Romeo events, step by step.

The Arese Museum Director used his mobile phone to record all the Alfa Romeo events for the interactive map, showing the exact location where the photographs and video clips were taken.

All the Alfa Romeos were closely guarded by Stefano Agazzi, Alfa Romeo Museum Director who came all the way from Italy, not only to take care of the cars, but above all to share in on the excitement of the Festival!

Coming soon, the video clips and photos of the whole weekend. Don’t miss them!

The time has come at last, all ye MiTo-maniacs. True - we made you wait for it: but we on the Team know how great your trust and patience are.

And you won’t be disappointed, because we worked every second of that time to offer you absolutely unique materials.

In line with the blog’s tradition we have recorded the experience of the designers and makers of Alfa Romeo MiTo’s new engine: the MultiAir!

Nothing less than a revolution in the field of petrol engines, comparable to common rail technology for diesel.

During the month of July, AlfaMiToBlog will post a mini-series, a storehouse of news and curiosities that will satisfy even the most demanding readers!

Today's star guest is one of the leading engineers of Fiat Powertrain Technology:
Engineer Damiano Micelli, Head of Petrol Engine Research.

Enjoy the video!