In the Teams’ Championship, ASM Formule 3 retained the title that it had secured in 2004, with Signature in a distant second place. Third place was taken by Prema Powerteam, which had won the Euro Series' first teams' title in 2003. Manor Motorsport was classified 4th overall, as it continued to improve its form against rivals with more experience in Europe. At this time, the Spiess-Opel engine was still numerically dominant, but won on only two occasions. HWA-Mercedes had begun to gain the upper hand in 2004 (with 13 wins from 20 races), and increased its development effort to win 18 races in 2005.