This was entitled worlds biggest diesel engine.
I dont know if thats still the case . . . but mighty impressive.
Stats - The cylinder bore is just under 38" and the stroke is just over 98". Each cylinder displaces 111,143 cubic inches (1820 liters) and produces 7780 horsepower. Total displacement comes out to 1,556,002 cubic inches (25,480 liters) for the fourteen cylinder version.
Total engine weight: 2300 tons (The crankshaft alone weighs 300 tons.)
Length: 89 feet
Height: 44 feet
Maximum power: 108,920 hp at 102 rpm
Maximum torque: 5,608,312 lb/ft at 102rpm
Struggle to fit in your z though!
Info copied from here (more pictures too)
http://people.bath.ac.uk/ccsshb/12cyl/