Think Twice Before Buying a Plug-In Hybrid After This Video

Understanding the Efficiency of Different Car Models

Testing the efficiency of three versions of the same car model can yield some surprising outcomes. A recent experiment involving a BMW 520i, 530e, and i5 highlighted some interesting results that may influence how consumers think about plug-in hybrids (PHEVs) versus traditional gasoline-powered or fully electric vehicles.

The 520i, a conventional gasoline-powered car, demonstrated higher efficiency than the 530e, a PHEV, when the battery was completely empty. This finding underscores an important consideration for potential buyers: PHEVs are best suited for individuals who can consistently charge their vehicles. These cars combine the benefits of both internal combustion engines and electric motors, offering a certain range on electricity alone and the flexibility of a gas engine for longer trips. However, their fuel economy numbers are only achievable if the battery remains charged.

When a PHEV’s battery is depleted, the gasoline engine must take over not only to power the vehicle but also to generate electricity for the battery. This dual responsibility leads to increased fuel consumption compared to a purely gasoline-powered car. As a result, the efficiency of a PHEV is heavily dependent on regular charging habits.

Real-World Testing and Performance Analysis

In a recent test, three models of the BMW 5 Series were evaluated in terms of range and efficiency. The 520i, 530e, and i5 were driven on a set route, with various parameters measured to assess how closely they matched their manufacturer-claimed figures. While the video had some inconsistencies, the 520i outperformed the 530e in terms of efficiency.

Both the 520i and 530e are equipped with a four-cylinder turbo engine, but the 530e has an additional electric motor integrated into the gearbox, drawing power from a 19.7-kilowatt-hour battery. This setup allows the 530e to travel over 60 miles on electric power alone, as demonstrated in real-world driving. However, the added weight of the 530e negatively impacts its driving experience, making it less appealing to driving enthusiasts.

Interestingly, the 530e showed superior braking performance due to its ability to use regenerative braking from the electric motor alongside friction brakes. The i5, a fully electric vehicle, also features regenerative braking but has more mass to stop, which slightly affects its performance. Despite this, the i5 remains a strong contender among the three models tested.

Considerations for Consumers

For many drivers, the decision between a PHEV, a non-plug-in hybrid, or a fully electric vehicle (EV) depends on their lifestyle and driving habits. While PHEVs offer impressive fuel economy numbers on paper, these figures are only attainable if the battery is regularly charged. For those with daily commutes, this requirement may be impractical.

Non-plug-in hybrids provide a more straightforward solution, offering improved fuel efficiency without the need for regular charging. On the other hand, EVs have larger batteries and do not require frequent charging, making them a more convenient option for many drivers.

Ultimately, the choice between these vehicle types comes down to individual needs and preferences. For those who can commit to consistent charging, a PHEV may be a viable option. However, for most consumers, a non-plug-in hybrid or a fully electric vehicle might be a more practical and efficient choice.