Motori Moderni
The JH22 was noted as a development of the Renault-based JH21C that the team had used in two races towards the end of . However, while the JH21C had been fitted with a Motori Moderni turbocharged engine and Pirelli tyres, the JH22 was fitted with a normally-aspirated Ford-Cosworth DFZ V8 engine and Goodyear tyres. It also carried a 1970s-style airbox aft of the fuel tank, although this was replaced with a smaller and more conventional air intake as the season progressed.