Ahmed bhai, every car, big or small, feels the force of wind on highways in windy conditions. Similarly, one feels pushed as well when a bus etc overtakes you at high speed on the highway.
Narrow and tall cars, such as the wagon R, old city etc. feel this force more. Bigger and wider cars, such as the new city or corolla etc, feel this force less.
Insha Allah with time, you will learn about the handling of your wagon R on highways in windy situations. In normal conditions, the wagon R handles perfectly on highways at high speed, as experienced by many members here, including myself.
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