The calculated distance (air line) between Rupea and Piatra Neamţ is approximately 81 miles respectively 130 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Rupea and Piatra Neamţ has been calculated here.
Air line (approximately)
130 kilometers
70 nautical miles