The Peugeot 106 GTI engine is a 1.6-litre petrol engine, which produces 118 bhp and 110 lb-ft of torque. The 1.0-litre engine is a petrol engine, which produces 45 bhp and 50 lb-ft of torque.
The Peugeot 106 GTI engine is significantly more powerful than the 1.0-litre engine, so it will provide a significant increase in performance. However, the 106 GTI engine is also significantly larger and heavier than the 1.0-litre engine, so it will also add weight to the car and reduce its fuel economy.
The 106 GTI engine is not a direct replacement for the 1.0-litre engine, and it will require modifications to the car to fit. This includes modifying the engine mounts, the exhaust system, and the electrical system.
In addition, fitting the 106 GTI engine into the 106 will require the car to be re-registered with the DVLA, as the engine change will alter the car's power output and emissions.
Overall, while fitting the 106 GTI engine into the 1997 1.0 106 is possible, it is a complex and expensive modification which will require careful consideration and planning.
