Selespeed

Selespeed is the name of the Magneti Marelli developed electrohydraulic manual transmission used in Alfa Romeo cars. The Selespeed is a robotized manual gearbox with electronic clutch. In its current incarnation it can be operated via paddle shifters from the steering wheel or via a "joystick" like a sequential manual gearbox. The right-hand paddle shifter shifts upwards and the left side downwards. The gearbox also has a city-mode which self-shifts in a manner similar to a traditional automatic gearbox.

Selespeed was first introduced in 1999 in the Alfa Romeo 156.Cite web|url=http://www.fiatautopress.com/index.php?method=cartelle&action=zoom&id=20041220314081583da688bf3dbbeee34b924a74271f8bc4|title=Press release 20/01/1999|accessdate=2007-05-08|work=fiatautopress.com] At that time it was the first car in its class with such a robotized gearbox. This first version had buttons on the steering wheel for changing gear. With the facelift of the 156 in 2002 these buttons were replaced by paddle shifters.

During normal driving it is possible to use either the paddles or the joystick but if the driver tries to use paddles during joystick mode the joystick has higher priority. The speed of the gear change depends on the engine revs, if the engine has more than 5000 rpm and the throttle is pressed more than 60% the change is faster. The system also has a rev limiter to avoid over revving, (in GTA models this behaviour is removed). This gearbox is made for sportive driving but the city-mode allows using it like an automatic gearbox in city driving.

The newest generation of Selespeed has a 'Sport' mode for both manual shifting and automatic operation.Cite web|url=http://www.alfaromeo.com.au/default.asp?action=article&ID=18607|title=Alfa Romeo Adds Automatics And A New Diesel To The 159 Sedan Range|accessdate=2007-05-08|work=alfaromeo.com.au]

The system is produced by Italian company Magneti Marelli. Other cars using similar gearboxes are the Ferrari F355 F1 and Aston Martin Vanquish.Cite web|url=http://www.autozine.org/html/Aston/Vanquish.html|title=Aston Martin Vanquish|accessdate=2007-05-08|work=autozine.org] The base system is similar in all cars but the speed of operation is usually faster in higher priced cars. BMW's first generation SMG was also partly a Magneti Marelli system.Cite web|url=http://www.evo.co.uk/carreviews/evocarreviews/19725/bmw_330i_smg.html|title=BMW 330i SMG | evo Car Reviews|accessdate=2007-05-08|work=evo.co.uk]

The following Alfa Romeos were or are available with Selespeed:

Notes

Further reading

* [http://www.autozine.org/technical_school/gearbox/tech_gear_manual.htm autozine technical school]
* [http://www.selespeed.info/ selespeed.info]
* [http://homepage.mac.com/paul_denyer/selespeed/index.html Alfa Romeo Selespeed]