Ask ten owners how far the same EV goes and you may get ten different answers.

That does not mean somebody is lying. Electric-car range changes with the journey.

Some factors make a small difference. Others can move the number enough to matter when you are choosing between cars.

Speed

For long-distance driving, speed is one of the biggest factors.

At higher speeds the car has to work harder to push through the air. That is why motorway range is usually lower than the sort of result an efficient EV can manage in slower urban driving.

If most of your mileage is on dual carriageways and motorways, look for data from that type of journey rather than relying only on an overall average.

Temperature

Batteries and cabins both care about temperature.

Cold weather can reduce battery efficiency, while heating the cabin also takes energy. Very hot weather can increase air-conditioning use.

The effect is not identical for every model, which is why MyEVRange keeps cold, average and hot journeys separate where enough data exists.

Heating and air conditioning

Climate control is powered from the same battery that drives the car.

On a long journey the impact can be relatively modest because the energy used to heat or cool the cabin is spread over many miles. On repeated short trips it can be much more noticeable.

Wheels and tyres

Large wheels can look great, but different wheel and tyre packages can change efficiency.

Rolling resistance, tyre width, pressure and aerodynamics all play a part. Some manufacturers publish different WLTP figures for different specifications of the same model for exactly this reason.

This is also why we try to keep MyEVRange pages split by the closest exact vehicle variant rather than throwing every version of a model into one bucket.

Weight and load

Passengers and luggage add weight. On a flat steady motorway the effect may be less dramatic than people imagine, but stop-start driving and hilly routes make additional mass more relevant.

MyEVRange uses a simple split — Driver only or Fully loaded — because we want contributors to finish the form rather than weigh their luggage.

Hills and route

Climbing uses energy. Regenerative braking can recover some energy on the way back down, but it does not give you all of the climb back for free.

A one-way journey with a large change in elevation can therefore produce a range figure that looks unusually good or bad.

Across a large number of owners and journeys, those individual route effects begin to balance out.

Wind and rain

A strong headwind is effectively extra aerodynamic resistance. Wet roads can add rolling resistance too.

These are difficult variables to ask every contributor to record accurately, so they are better handled through sample size than a huge submission form.

Battery age

EV batteries gradually lose usable capacity as they age. How quickly that happens depends on the battery chemistry, thermal management, use and time.

As MyEVRange gathers older vehicles and more mileage, this is an area we would like to analyse separately rather than pretending a new and a high-mileage example are always identical.

There is no single perfect range figure

The useful answer is a range of answers.

Official WLTP tells you how cars compare under a standard test. Published tests add another point of reference. Owner journeys show what happens in ordinary use.

Put those together and you get a much better idea of whether an EV will actually suit your driving.