The Yamaha Alpha is a great scooter with a powerful engine and excellent performance. It has a 125cc engine that delivers 7.1 bhp of power and 8.7 Nm of torque. The TVS Zest, on the other hand, has a 110cc engine that produces 8.4 bhp of power and 8.7 Nm of torque. The Alpha offers a smoother ride, with better handling, compared to the Zest. Additionally, the Alpha has a better fuel economy of around 45-50 kmpl, compared to the Zest’s 40-45 kmpl. Both scooters offer good value for money, but the Yamaha Alpha offers a more powerful engine and better performance overall.