During World War I, the Duesenbergs designed and built aircraft engines in Elizabeth, New Jersey. They relocated to Indianapolis, Indiana, in 1920 and re-launched the Duesenberg Automobile and Motors Company, manufacturing the Duesenberg Model A. The Duesenberg brothers assumed engineering roles after signing over the naming rights and patents for Duesenberg engines to promoters Newton E. Van Zandt and Luther M. Rankin. The first Model A was commissioned by Hawaiian businessman and politician Samuel Northrup Castle. The car had a 260 cubic inches (4.3 L) straight-eight engine that output 88 horsepower, the largest engine in a commercially available vehicle at the time, and was the first to have hydraulic brakes on all its wheels.