That engine family is the one that really needs to be replaced with a modern clean sheet design. (greencarcongress.com)
The 757 was a clean sheet design with an in - house designed chassis and a bespoke, 13G, three - rotor rotary engine. (automobilemag.com)
But its Family 1 engines are comparative dinosaurs and these antiques need replacement with a clean sheet design, engine family as Ford is doing. (greencarcongress.com)