The RAM 03 was a racecar designed by Gustav Brunner and Sergio Rinland which was raced in the 1984 season of Formula One.

The RAM 03 made its debut at the 1985 Brazilian Grand Prix. The cars were driven by Manfred Winkelhock (where he finished 13th) and Philippe Alliot (where he finished in 9th). The other driver used throughout the season was Kenny Acheson. The cars were fitted with a Hart 415T L4 engine and rode on Pirelli tyres. The chassis was of an aluminium monocoque design and the total weight of one of the cars is 550kg.

The cars did not have a very successful racing career with mechanical problems plaguing the efforts of the drivers to secure a race victory.