The Tainan to Taichung route is primarily served by the Taiwan High Speed Rail (THSR) with the Puyuma and Taroko Express trains offering alternatives for this journey. The fastest among them, the Puyuma Express, can reach speeds of up to 130 km/h (81 mph) and takes approximately 1 hour and 30 minutes to cover the 100 km (62 miles) distance between the two cities, making it a time-efficient choice for travelers. The Taroko Express, while slightly slower, at speeds around 120 km/h (75 mph), connects Tainan to Taichung in about 1 hour and 50 minutes, providing a scenic route with more stops along the way, including major stations and local points of interest.
Both trains offer various seating options, with the Puyuma featuring a modern design, focused on passenger comfort. The onboard services include free Wi-Fi, power outlets, and food and beverage options. For those interested in a speedy transit, the Puyuma Express is the recommended train, while the Taroko Express offers a leisurely travel experience with a chance to explore regional areas.