Question: what is a 7.3 diesel?
Answer: The first engine to bear the Power Stroke name, the 7.3L Power Stroke V8 is the Ford version of the Navistar T444E turbo-diesel V8. ... The Power Stroke is an electronically controlled, direct injection engine with a 4.11 in × 4.18 in (104.4 mm × 106.2 mm) bore and stroke creating a displacement of 444 cu in (7.3 L).