What is the difference between Volvo S60 T4 and B4?
2 Answers
1. Driving Experience: The power parameters of the two engines are almost identical, with negligible differences. Therefore, the main distinctions lie more in the driving experience. Firstly, the B4 engine utilizes a 48V motor, which delivers smoother starts. The 2022 model also removed the auto start-stop switch button, making it impossible to manually disable the start-stop feature. During vehicle startup, the motor intervenes to bring the engine to the required starting RPM before ignition, effectively eliminating the sensation of startup vibrations and ensuring a seamless experience. In this regard, the B4 engine holds a clear advantage. However, during rainy weather, especially on waterlogged roads, it is advisable for 2022 models to avoid wading through deep water to prevent potential stalling and restart issues. 2. Fuel Consumption: The 2022 B4 model shows a slight reduction in fuel consumption compared to the T4, primarily due to the benefits of the auto start-stop feature, though the difference is not significant, and overall fuel efficiency remains largely comparable. Other differences between these two engines are minimal. Some 2022 model owners have reported engine fault codes with the B-series engines, which were resolved after a software update at the dealership, indicating that the issue was related to software debugging rather than hardware problems, posing no major concern.
I've driven quite a few Volvo cars, and I feel the main difference between the S60's T4 and B4 lies in the powertrain. The T4 is a pure gasoline engine with smooth power output, suitable for those who prefer a traditional driving feel. The B4 is a mild hybrid version with electric assistance, offering quicker starts, quieter operation, and significant fuel savings in congested areas. I also noticed that the B4 has slightly higher horsepower, around 197 hp compared to the T4's 190 hp, so the B4 feels more powerful during acceleration, especially when overtaking on uphill roads. The hybrid system also provides better fuel efficiency, saving about 10% in city driving—which is quite substantial, as the annual fuel savings could cover several nice dinners. However, the B4 is a bit more expensive, costing around 10,000 to 20,000 yuan extra, but I think its eco-friendliness makes it ideal for drivers who prioritize energy efficiency. Overall, the B4 feels more tailored to modern tech-driven driving, while the T4 retains a classic feel. If you don’t often drive long distances, the T4 might be sufficient.
