Irvine, California is 2.9 times larger than Pasadena, California.
Area: 173 km2 calculated
Irvine is a suburban city in Orange County, California, United States. It is a planned city, mainly developed by the Irvine Company since the 1960s. Wikipedia
Area: 60 km2 calculated
Pasadena is a city in Los Angeles County, California, United States. As of 2010 United States Census, the population of Pasadena was 137,122, making it the 180th-largest city in the United States, down from 168th place in 2009. Pasadena is the ninth-largest city in Los Angeles County. Wikipedia