The calculated distance (air line) between Bochum-Hordel and Auderghem is approximately 128 miles respectively 206 kilometers.
By car or train, the actual journey to Auderghem is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Auderghem has been calculated here.
Air line (approximately)
206 kilometers
111 nautical miles