Toyota 4 speed auto is much better than honda 5 speed prosmatec transmission, its a personal experience, others can also shade the light, we have City 2014 auto, it never shows above 10-10.5 km/l on meter although it is 5 speed auto and with small stock 175/65/r15 tires.
I just bought Altis 1.6 4 speed auto, with large tires 195/65/r15 and under 1000 kms, it is giving me 9.5 km/l... which will surely jump to at least 11 km/l after break-in, with big tires and body, powerful engine it is giving better fuel consumption than city...This is one aspect.. i also observe the shifting of toyota 4 speed auto to be much smoother