wagon R has great pick and acceleration even with AC on but with 5th gear and under 3k rpm, it goes till 100 km/h, beyond that it req rpm beyond 3k which is neither economical nor recommended. Therefore, i think its powerful machine best design for urban and extra urban drive and upto speed of 100 km/h.
its recommended for those who has 80 % city drive and 20% long drive requirement/ use.