Oh, OK then..
Pi (3.14159) x radius squared (5.2195cm x 5.2195cm), or 27.24318cm = 85.5869sq. cm. So far so good? Bore area (85.5869 sq. cm) x stroke (10.439cm) = 893.4416cc per cylinder x 8 cylinders = 7,147.533cc, or 7.14L.... Hmmmm, Lets convert 7.147L to cu. in.... Wow! 436.137 cu. in...