Portland, Oregon is 2.8 times larger than Moreno Valley, California.
Area: 133 km2 calculated
Population: 199,552 (2012)
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: 376 km2 calculated
Population: 603,106 (2012)
Portland is the largest city by population in the U.S. state of Oregon, near the confluence of the Willamette and Columbia rivers. Wikipedia