The JS2 was homologated for road use and used a Maserati V6 engine, while the JS3 was an open-top sports-prototype powered by a Cosworth DFV V8 engine.
The JS2 was homologated for road use. The JS2 was used a Maserati V6 engine. The JS3 was an open-top sports-prototype. These open-top sports-prototype were powered by a Cosworth DFV V8 engine.