What's the difference between Volvo S60 T4 and B4?
3 Answers
The differences between the Volvo S60 T4 and B4 series are as follows: Driving experience: Compared to the T4, the B4 series starts more smoothly. The 2022 model also removed the auto start-stop switch button, so it cannot be manually turned off. During vehicle startup, the motor's intervention ensures the engine reaches the required starting speed before ignition, making the startup vibration almost imperceptible and not affecting the driving experience. In this regard, the B4 engine has an advantage. However, in rainy weather, especially on waterlogged roads, it's advisable to avoid wading through deep water with the 2022 model to prevent the risk of stalling and restarting. Fuel consumption: The B4 series has slightly lower fuel consumption compared to the T4, mainly due to the benefits of the auto start-stop function, but the difference is not significant, and fuel efficiency is essentially comparable. Power: There are minimal differences in other aspects between the two engines, with nearly identical power parameters. Both the T-series and B-series engines are mature Volvo engines, and as long as there are no major defects during use, they are considered excellent engines.
Having driven for several years, I think the biggest difference between the Volvo S60 T4 and B4 lies in their engine technologies. The T4 is a standard turbocharged gasoline engine with an output of around 190 horsepower, delivering quick acceleration but relatively higher fuel consumption, especially in city traffic where it feels like it's guzzling fuel. The B4, on the other hand, incorporates a 48V mild hybrid system, meaning it has a small battery and electric motor to assist, boosting power to approximately 197 horsepower. It starts more smoothly and quietly, offering a silkier driving experience, and can recover energy during braking to save fuel. On average, the B4 consumes about 15% less fuel and has lower emissions. If you're after driving pleasure while also considering environmental impact, the B4 is definitely worth choosing, especially since mild hybrids are a cost-effective transitional option in the current shift toward electric vehicles.
As a frequent long-distance driver, I have hands-on experience with both the Volvo S60 T4 and B4 models. The T4 version uses a traditional gasoline engine, delivering strong acceleration but noticeable noise during startup. Fuel consumption is acceptable on highways but higher in city driving. The B4 incorporates a hybrid system, offering a distinct driving experience: the engine automatically shuts off at red lights, relying on electric power for smooth and fuel-efficient starts, especially advantageous in congested areas. Performance-wise, the difference between the two is minimal, though the B4 has slightly higher horsepower, quicker response, and provides a more comfortable and stable ride. In the long run, while the B4 is a bit more expensive upfront, it saves significantly on fuel costs with similar maintenance expenses, making it ideal for daily commuters like me. I believe the B4 outperforms the T4 in efficiency and everyday practicality, making it a worthwhile investment.
