Memphis, Tennessee is 6.4 times larger than Moreno Valley, California.
Area: 133 km2 calculated
Moreno Valley is a city located in Riverside County, California and is part of the San Bernardino-Riverside Metropolitan Area; the city is 19 miles south of downtown San Bernardino, while Riverside lies directly to the west. Wikipedia
Area: 849 km2 calculated
Memphis is a city in the southwestern corner of the U.S. state of Tennessee, and the county seat of Shelby County. The city is located on the 4th Chickasaw Bluff, south of the confluence of the Wolf and Mississippi rivers. Wikipedia