Since the EVs in Pakistan are increasing, how can one know which one is more energy efficient. Fuel efficiency is always an important factor when choosing ICE vehicle, but it's even more important in case of EV because it can increase or decrease the range for a similar battery capacity.
A common standard used to define EV efficiency is km per kWh. Or you can say how many km vehicles can run in single unit of electricity. Taking an example of Seres 3. It has battery capacity of 49.34 kWh and its company claimed range is 400 km. To find km/kWh, divide range 400 km with battery capacity, i.e. 49.34 kWh.
400 km / 49.34 kWh = 8.11 km/kWh
So, Seres 3 can run 8.11 km for a single unit of electricity. I calculated efficiencies of all EVs available in Pakistan based on the company claimed range.
Ora 03
Battery Capacity: 48 kWh
Range: 310 km (WLTP)
Efficiency: 6.46 km/kWh
Seres 3
Battery Capacity: 49.34 kWh
Range: 400 km (NEDC)
Efficiency: 8.11 km/kWh
Volt EV
Battery Capacity: 16.5 kWh
Range: 200 km (NEDC)
Efficiency: 12.12 km/kWh
MG4
Battery Capacity: 51 kWh
Range: 350 km (WLTP)
Efficiency: 6.86 km/kWh
MG ZS EV
Battery Capacity: 51 kWh
Range: 320 km (WLTP)
Efficiency: 5.78 km/kWh
MG5
Battery Capacity: 61 kWh
Range: 403 km (WLTP)
Efficiency: 6.61 km/kWh
One important thing that should be mentioned here is manufacturers write NEDC or WLTP in front of range. These are testing standards through which range is defined. Right now there are 4 standards
EPA (USA)
WLTP (Europe)
NEDC (Europe)
CLTC (China)
I won't get in detail how vehicles are tested under these standards to get the range. But as a rule of thumb, EPA range is usually the lowest and closest to real world range. CLTC usually has the highest range.
EPA < WLTP < NEDC < CLTC
So you can say the range (NEDC) of Seres 3 and Volt EV is less close to real world than Ora 03 (WLTP) and all MG (WLTP) vehicles.