The partnership resulted in the marketing of Jeep vehicles in Europe. The Jeep XJ Cherokee may have been a joint AMC/Renault project since some early sketches of the XJ series were made in collaboration by Renault and AMC engineers (AMC insisted that the XJ Cherokee was designed by AMC personnel; even though a former Renault engineer designed the Quadra-Link front suspension for the XJ series). The Jeep also used wheels and seats from Renault. Part of AMC's overall strategy was to save manufacturing costs by using Renault parts and engineering expertise when practical. This led to the improvement of the venerable AMC inline six – a Renault/Bendix-based port electronic fuel injection system (usually called Renix) transformed it into a modern, competitive powerplant with a jump from with less displacement (from 4.2 to 4.0 litres). The XJC Cherokee concept, which was conceived in 1983 as a successor to the XJ series, was also a joint collaboration with AMC and Renault engineers until the design was inherited by the Chrysler Corporation in late 1987 after Renault divested AMC – which debuted in 1989 as the Jeep Concept 1 (evolving into the Jeep Grand Cherokee in April 1992).