The calculated distance (air line) between Tecuci and Piatra Neamţ is approximately 90 miles respectively 146 kilometers.
By car or train, the actual journey to Piatra Neamţ is certainly longer, as only the direct route (as the crow flies) between Tecuci and Piatra Neamţ has been calculated here.
Air line (approximately)
146 kilometers
79 nautical miles