The calculated distance (air line) between Bad Neuenahr-Ahrweiler and Bochum is approximately 65 miles respectively 105 kilometers.
By car or train, the actual journey to Bochum is certainly longer, as only the direct route (as the crow flies) between Bad Neuenahr-Ahrweiler and Bochum has been calculated here.
Air line (approximately)
105 kilometers
56 nautical miles