The EFDA Nations Cup was a Formula Opel competition which was held between 1990 and 1998.

The first Nations Cup race was held at the historic Spa-Francorchamps circuit in Belgium on 19–20 July 1990, and organised by the European Formula Drivers Association (EFDA).

In 1990, drivers representing 25 countries were already participating in the various Formula Vauxhall/Opel Lotus Series.

The EFDA selected the Spa-Francorchamps circuit, licensed to start 46 cars or 23 two-car teams, for the inaugural event.

The winners received the Nations Cup, and the top three teams were awarded gold, silver and bronze medals respectively.