
The difference is that the T4 engine has a maximum power of 140 kW; the T5 engine has a maximum power of 187 kW. The T4 engine has a maximum torque of 300 Nm; the T5 engine has a maximum torque of 350 Nm. Introduction to Vehicle Dynamics: Vehicle dynamics refers to the average driving speed that a car can achieve when driving straight on a good road surface, determined by the longitudinal external forces acting on the car. It is one of the fundamental performance characteristics of a car. Introduction to Automotive Engines: The automotive engine is the device that provides power to the car, serving as the heart of the vehicle. It determines the car's dynamics, fuel efficiency, stability, and environmental friendliness. Depending on the power source, automotive engines can be classified into diesel engines, gasoline engines, electric vehicle motors, and hybrid systems, among others.

I previously compared the Volvo S90 T4 and T5 versions, and the biggest difference lies in the engine power. The T4 has 190 horsepower, which is adequate for daily driving but feels a bit sluggish during acceleration. The T5 delivers 254 horsepower, making high-speed overtaking very crisp and decisive. The T5 also comes with additional configuration options, such as the premium Bowers & Wilkins audio system and ventilated seats. In terms of fuel consumption, the T4 is slightly more economical, saving about one liter per 100 kilometers. For daily commuting, the T4 is perfectly fine, but if you enjoy driving excitement or frequently take long trips, the T5's stronger acceleration is definitely more thrilling. With a price difference of several tens of thousands, I recommend test driving both at the dealership to truly feel the difference.

As a friend who often helps others choose cars, I think the core difference lies in the powertrain tuning. The T4 uses a low-power 2.0T engine, which is smooth enough for city driving; the T5 increases turbo pressure, delivering much stronger explosive power. In actual driving experience, the T5's 8AT transmission downshifts more aggressively, and the acceleration push can last for three to four seconds when you floor the pedal. In terms of configuration, the T5 can be upgraded with a crystal gear knob and HUD display, and paddle shifters come as standard. If you're on a tight budget, the T4 is absolutely sufficient, but the T5 won't feel outdated in terms of power even after five years, and it also holds higher residual value in the used car market.

After driving my friend's S90 T5 and comparing it with my T4, the difference is quite noticeable. In traffic jams, there's no distinction, but on the highway, the T5 responds immediately—overtaking trucks is just a matter of stepping on the gas. The T4 is sufficient for daily use, though it struggles slightly when fully loaded on uphill roads. In terms of configuration, the T5 offers optional air suspension, making it smoother over speed bumps. The difference in fuel consumption is minimal, around 0.8 liters per 100 kilometers, largely depending on your driving habits. With a price difference of fifty thousand yuan, it's best to choose based on your needs.

When we switched to the S90 at home, we compared these two models in detail. The T4 offers smooth power delivery and good fuel efficiency, which is more than enough for picking up the kids. The T5 feels like being pushed forward during acceleration, with ample power reserves. In terms of features, the T5 adds rear seat heating and electric sunshades, along with better overall sound insulation. The price difference reflects these details—if you prefer a quieter and more comfortable ride, go for the T5. Maintenance costs are similar in the long run, with the main difference being the annual vehicle and vessel tax.


