The previous model, released in 2004 and facelifted in 2008 has been updated with a more aerodynamic exterior and gadget-packed interior.
The small family hatchback joins the Citroen C3 and C5 in the new-look Citroen line-up which will be expanded with premium D-line models, starting with the new DS3 released earlier this year.
Citroen will showcase the new C4 at the Paris Motor Show in September prior to its launch in early 2011, but the new images released today show a longer, wider and taller vehicle than the outgoing model.
Available only as a five-door hatchback, the design incorporates more leg and head room for passengers and a class-leading boot capacity of 480-litres.
Despite the larger dimensions, a restyled front spoiler and a more coupe-like roofline means the new C4 will be more aerodynamic and fuel efficient than previous versions.
Lighter building materials and efficient components such as energy-saving tyres and Stop&Start technology will reduce fuel consumption, Citroen says, although no official estimates have yet been released.
CO2 emissions will be down, however. Citroen will include a low-CO2 model to the range offering 109g/km courtesy of a micro-hybrid e-HDi powertrain. This figure will fall below 100g/km in future models as the technology is refined.
Drivers will be able to manage and receive advice on fuel consumption, maintenance and service issues via the Citroen eTouch system, included for the first time on a C4 model.
Like its predecessor, the Citroen C4 will host a range of equipment including new additions such as a cornering light function, blind-spot information system and cruise control. The new C4 will retain the hill start assist, lane departure warning system and Xenon headlamps from the current model.
Higher specification models will benefit from a massage function on the front seats, and all models will be fitted with a new drivers instrument display with adjustable colours, a surround sound audio system and adjustable air conditioning.
Citroen will unveil the C4 at the Paris Motor Show in September, and prices and specification details will be announced closer to the launch date in early 2011.