The seventh-generation Civic was released in September 2000, for the 2001 model year. While it retained the previous generation's exterior dimensions, interior space was improved in part by using a flat rear floor thus bumping up Civic to a compact car size segment.[according to whom?] The front suspension was changed from that of a double wishbone to a MacPherson strut, in order to lower costs, as well as allow more engine bay room for the newly introduced Honda K-series engine. Power was also increased on some trim levels. The four main trim levels were DX, LX, EX and HX. The Civic Coupe was no longer sold in Japan starting with this generation.