Original sentence: The Centaurus had a cylinder capacity of 3,270 cubic inches (53.6 L), making it one of the largest piston aircraft engines to enter production, while that of the Hercules was 2,364 cubic inches (38.7 L)
Edited sentence: A projected enlarged capacity version of the Centaurus was designed by Roy Fedden, cylinders were produced for this engine but it was never built.Cambridge, England.Development of Piston Aero Engines.Gunston, Bill.ISBN 0-7509-4478-1.Known as the Bristol Orion (a name used previously for a variant of the Jupiter engine) this development was also a two-row, 18 cylinder sleeve valve engine with the displacement increased to 4,142 cubic inches (67.9 L).Patrick Stephens Limited, 2006.The Centaurus had a cylinder capacity of  (53.6 L), making it one of the largest piston aircraft engines to enter production, while that of the Hercules was 2,364 cubic inches (38.7 L)