I am a beginner and trying to calculate the starting torque for my vehicle project with following specs:

Vehicle mass (with passengers and battery)=1000kg

Motor selection= AC-20 HPEVS depending on the starting torque i calculate

I need to meet the following performance criteria:

1. 0-60kmh in 20 Seconds

2. Vehicle to be driven in urban city traffic like paris, tokyo etc.

Based on this information I have tried to calculate the starting torque needed:

Acceleration from 0-60kmh in ms2 = 0.553

Mass kg =1000

Accelerating force= ma= 553N

Force against rolling R= u m g = 0.01 * 1000*10= 100N

Total tractive force= 653N

Now if this is the force needed to move the car, I want to reverse engineer to get to "motors torque":

Wheel torque = Tractive force * radius tyre in m = 653 * 0.3 = 195Nm

Now it is known that the Motor torque= Wheel torque / Diff Ratio

so assuming a Diff Ratio of 5:1,

a Motor torque= 39 Nm continuous is what I need?

My question:

1. Is this calculation correct and realistic for selecting a motor for my criteria?

2. Which graph should i refer to Torque vs RPM in "Peak" or "Continuous"?