Most modern tuk-tuks (auto-rickshaws) in 2026 are powered by small, efficient single-cylinder, four-stroke engines, typically ranging from 150cc to 250cc. In traditional gasoline models, popular engines include the water-cooled Lifan 200cc or specialized units from manufacturers like Bajaj or Piaggio. These engines are designed for high torque at low speeds to handle heavy passenger loads in dense urban traffic. However, 2026 has seen a massive shift toward electric propulsion in major markets like Thailand and India. Electric tuk-tuks utilize brushless DC (BLDC) motors powered by lithium-ion battery packs, offering a cleaner, quieter alternative to the noisy "two-stroke" engines of the past. These powerplants typically produce around 10–15 horsepower, enough to reach top speeds of 60 km/h (37 mph) while maintaining the durability required for 12-hour taxi shifts.