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