Phoenix Park is 73% larger than Golden Gate Park.
Area: 4 km2 calculated
Golden Gate Park, located in San Francisco, California, United States, is a large urban park consisting of 1,017 acres of public grounds. Configured as a rectangle, it is similar in shape but 20 percent larger than Central Park in New York, to which it is often compared. Wikipedia
Area: 7 km2 calculated
Phoenix Park is an urban park in Dublin, Ireland, lying 2–4 km west of the city centre, north of the River Liffey. Its 11 km perimeter wall encloses 707 hectares, one of the largest walled city parks in Europe. Wikipedia