The Latest CRDi Technology Cooper 4-stroke, Liquid Cool, diesel engines are based on state of the art CRDi technology and are manufactured in technical collaboration with RICARDO, UK. The Common Rail Systems are governed by an engine control unit (ECU) which opens each injector electronically rather than mechanically. As a result, the fuel that is injected atomises easily and burns cleanly, reducing exhaust emissions and increasing efficiency. Cooper Available in gas as well as diesel variants with HPs ranging from 26 to 340, the engines would find application worldwide.