Why do automatic transmissions now get better fuel efficiency than manuals?
Not so long ago, it was common for automatic transmissions to be referred to as slushboxes, since that's how they often behaved. Rather than use a mechanical clutch, traditional automatic transmissions use a fluid coupling between the engine and the gear-sets to transmit drive torque. This provides some benefits, but isn't a perfect system.
Citroen is planning to follow other European automakers in launching a new eco-brand similar to BlueMotion and ecoNetic. In addition to the new branding, the French automaker will roll out fuel-saving features like automatic start stop across its entire model range over the next few years, including on the larger C5 and C6 models. The company will also increase availability of its EGS semi-automatic transmission as well as add manual transmissions to its larger engines.