Honda's concepts for the next Civic Coupe and Sedan are out, and their both rather attractive. The concept cars just rolled across the stage in Detroit, and now the official details are out. The two concepts give us the general outline of the 2012 Civic range--the Si Coupe and standard Civic Sedan--but leave some gaps for us to fill as production draws nearer.

You can expect the Civic Coupe to sport a frugal yet fun four-banger, plenty of available options and equipment as well as affordable entry-level trims, and as you can see in these photos, an aggressive new look. The four-door version shares the same basic look, but with a longer roof and a little more seating area--and without the pointier touches of the Si's package.

Powertrain details for the new Civic range remain murky, but  Honda will add its Eco Assist technology. The 2012 Civic marks Eco Assist's first implementation outside of a hybrid in the U.S. The Eco Assist tech is already used in the CR-Z and Insight hybrids. Details on the Si Coupe Concept's powertrain are still in limbo--we expect it to get more power as well as a more aggressive exterior and unique interior--but Honda has announced plans to expand its natural gas-powered Civic GX in the 2012 models.

Official photos of the Coupe and Sedan concepts follow.