The calculated distance (air line) between Bochum-Hordel and Koblenz is approximately 81 miles respectively 131 kilometers.
By car or train, the actual journey to Koblenz is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Koblenz has been calculated here.
Air line (approximately)
131 kilometers
71 nautical miles