Car prices are rising, and maintenance costs—DPF filters, AdBlue fluid, overall more complex exhaust treatment systems—only add to the total cost of ownership. Diesel cars are becoming increasingly rare in the market, especially in the lower and mid-range segments. Due to all this, they are becoming less desirable and more rejected.
Additionally, the environmental narrative increasingly favors electrified alternatives, and urban zones with restricted access for high-emission vehicles are becoming more common. True, we still don't encounter these restrictions here, but there are other arguments leading drivers to spontaneously turn to other solutions. The most stubborn won't consider such options quickly, but those moving in that direction are thinking about plug-in hybrids, which are emerging as the logical next step.
Fuel consumption at diesel levels
Until now, plug-in hybrids have deterred buyers due to overly expensive technology, almost no benefit from electric driving, and excessive gasoline consumption due to greater weight and a cumbersome system where the battery is constantly recharged. But most importantly, not all PHEVs are the same, and therein lies new hope for drivers.
Many drivers have tried first-generation plug-in hybrids, been disappointed, and written off the technology for good. That's understandable because older models were imperfect: without electric power, the gasoline engine works too hard, consumption is anything but economical, and the driving experience is uncomfortable.
Today, that no longer has to be the case, but only if the system is well-designed. The difference between a weaker and a quality PHEV system can be greater than the difference between a diesel and a conventional hybrid.
On long routes, smart technology compensates for the lack of chargers. Modern PHEV systems use navigation and route topography to independently decide when to use the electric motor and when to use the gasoline engine. The car consumes energy saved during descents on uphill sections, without any driver intervention. The result is an average consumption of about 5 to 6 liters per 100 kilometers even without a single charge, which is comparable to an average diesel in the same class.
An empty battery isn't a disaster if energy consumption management is software-optimized. In quality modern systems, the driving quality remains the same regardless of the battery state, the engine is rarely heard, and consumption doesn't change dramatically. This is a key difference compared to first-generation plug-in hybrids, and also compared to many current systems that still suffer as soon as the battery is depleted.
The city is where PHEV wins without debate
An electric range of 80–100 km covers daily urban needs without a drop of fuel. Some models smoothly exceed 100 km in electric mode. In short city drives, diesel engines operate below optimal temperatures and wear out problematic and expensive exhaust systems faster. PHEV offers clean, quiet, and cheap driving here.
Where does diesel still have a place?
The only serious stronghold remains price. A quality PHEV can cost at least €10,000 more than an equivalent diesel, and that gap only makes sense with regular charging and high annual electric mileage, i.e., without any gasoline consumption. Those without access to a charger pay for technology they can't use.
The good news is that certain PHEV models don't show the weaknesses of earlier generations when the battery is empty. That's what makes them interesting as alternatives.
Perhaps with a diesel, the average consumption might still be slightly lower, but with a good PHEV, expenses wouldn't be significantly different. Considering high fuel prices, costs would certainly be lower. What's fascinating about more advanced plug-in hybrids is that even without energy in the battery, the range won't be at the diesel level of 1,000 kilometers—though that has become both a challenge and a myth for many—but it will approach figures around 800 to 850 kilometers.
Thus, PHEV is a better choice for a driver who lives in the city, has charging capability, and occasionally travels longer distances, but only if they choose the right system. Otherwise, a bad PHEV can be worse than the worst diesel, and most of those are still on the market.