Will a 2002 Kia spectra engine interchange with 2004 Rio engine?

No, the Kia Spectra and Rio engines are not interchangeable. The 2002 Spectra has a 1.8L engine while the 2004 Rio has a 1.6L engine. Additionally, the Spectra engine is a DOHC (double overhead cam) engine while the Rio engine is a SOHC (single overhead cam) engine. This means that the cylinder heads are different and the camshaft is driven differently in these two engines. This makes it impossible to interchange the engines.