The B58 and S58 engine models are among the most popular choices if you’re seeking high performance, reliability, and efficiency.
In this post, we’ll be doing a B58 vs S58 comparison to help you determine which one to go for.
| Features | B58 Engine | S58 Engine |
| Configuration | Turbocharged | Twin-turbocharged |
| Power Output | 335-382 hp | 444-503 hp |
| Torque Output | 369-369 lb-ft | 406-479 lb-ft |
| Redline | 7000 rpm | 7200 rpm |
| Maximum Boost | 20.2 psi | 24.2 psi |
| Fuel Injection | Direct Injection | High Precision Injection |
| Application | BMW 3, 5, 7, X3, X5, X7, Z4 | BMW M3, M4, X3 M, X4 M, X5 M |
Pros of The B58 Engine
- High power output: The B58 engine is known for its high power output, with some models producing up to 382 horsepower.
- Smooth performance: The inline six-cylinder configuration of the engine provides smooth power delivery and a refined driving experience.
- Efficient: The B58 engine features advanced technologies like direct injection and variable valve timing that improve fuel efficiency and reduce emissions.
- Reliable: BMW has a reputation for building reliable engines, and the B58 is no exception.
- Tuner-friendly: Many owners have reported significant power gains from simple engine tuning such as exhaust upgrades or air intake.
Cons of The B58 Engine
- Expensive: The B58 engine is a high-performance engine, which means it can be expensive to maintain and repair.
- Complexity: The B58 engine is a complex piece of machinery, with many advanced features and technologies that require specialized knowledge and equipment to service.
- Potential for overheating: Some B58 engines have been known to experience overheating issues, particularly when pushed hard in hot weather.
- Turbo lag: Like most turbocharged engines, the B58 engine can experience some turbo lag at low RPMs, which can make it feel sluggish until the turbo spools up.
- Limited space: The B58 engine is a large and complex engine, which means it can be difficult to fit into smaller vehicles or tight engine bays.
Benefits of Owning a B58 Engine
1. High-performance
The B58 engine is known for its high power output and impressive performance capabilities, making it a popular choice for enthusiasts and sports car drivers.
2. Smooth and Refined Driving Experience
The inline six-cylinder configuration of the B58 engine provides smooth power delivery and a refined driving experience, making it an ideal choice for luxury vehicles and high-performance sports cars.
3. Advanced Technologies
The B58 engine features advanced technologies like direct injection and variable valve timing, which improve fuel efficiency and reduce emissions while also enhancing performance.
4. Reliability
BMW has a reputation for building reliable engines, and the B58 engine is no exception. Properly maintained, it can provide many years of trouble-free operation.
5. Tuner-friendly
The B58 engine responds well to aftermarket tuning, with many owners reporting significant power gains from simple modifications like an upgraded exhaust or air intake.
6. Brand Reputation
BMW is a respected luxury brand with a long history of building high-quality, high-performance vehicles. Owning a BMW with a B58 engine can provide a sense of prestige and status.
7. Resale Value
BMWs with B58 engines tend to hold their value well, making them a good investment for those who plan to sell their vehicle down the line.
Pros of The S58 Engine
- High power output: The S58 engine is designed to produce even more power than the B58 engine, with some models producing up to 503 horsepower.
- Advanced technologies: Like the B58 engine, the S58 engine features advanced technologies like direct injection and variable valve timing that improve performance and efficiency.
- Motorsport heritage: The S58 engine is based on BMW’s successful motorsport engines, giving it a racing pedigree and a reputation for high performance.
- Tuner-friendly: The S58 engine responds well to aftermarket tuning, with many owners reporting significant power gains from simple modifications like an upgraded exhaust or air intake.
- Sound: The S58 engine produces a distinct and satisfying exhaust note, thanks in part to its high-performance design and advanced exhaust system.
Cons of The S58 Engine
- Expensive: The S58 engine is a high-performance engine, which means it can be expensive to maintain and repair.
- Limited availability: The S58 engine is only available in select BMW models, which can limit your options if you’re looking for a vehicle with this engine.
- Complexity: Like the B58 engine, the S58 engine is a complex piece of machinery with many advanced features and technologies that require specialized knowledge and equipment to service.
- Reliability: While BMW has a reputation for building reliable engines, the high-performance design of the S58 engine can make it more prone to issues like overheating and premature wear.
- Fuel efficiency: Due to its high-performance design, the S58 engine may not be as fuel-efficient as some other engines in its class, which can lead to higher operating costs over time.
Benefits of Owning an S58 Engine
1. High Performance
The S58 engine is designed for high-performance applications, and it delivers impressive power and torque output. It can produce up to 503 horsepower and 479 lb-ft of torque, making it one of the most powerful engines in its class.
2. Efficient
Despite its high performance, the S58 engine is also relatively fuel-efficient, thanks to features like its twin-turbocharger system and improved cooling system. This means that drivers can enjoy the benefits of a high-performance engine without sacrificing fuel economy.
3. Lightweight
The S58 engine is constructed from lightweight materials, which helps to reduce the overall weight of the vehicle. This, in turn, can improve handling and performance, as well as fuel efficiency.
4. Advanced Technology
The S58 engine is equipped with advanced technology, including a high-precision injection system and a variable valve timing system. These features help to improve engine efficiency and performance.
5. Durability
Although there have been some reported issues with the S58 engine, it is generally considered to be a durable and reliable engine. With proper maintenance, it should provide many years of trouble-free operation.
Similarities Between B58 Engine and S58 Engine
- Architecture: Both engines have the same basic architecture, with six cylinders arranged in a straight line.
- Cylinder Block: The cylinder block for both engines is made of lightweight aluminum to reduce weight.
- Turbocharging: Both engines feature turbocharger that helps to boost performance.
- Valvetrain: Both engines use BMW’s Valvetronic variable valve lift system and Double VANOS variable camshaft timing.
- Direct Injection: Both engines use high-pressure direct fuel injection for improved efficiency and power.
- Power Output: Both engines are capable of producing high levels of power and torque, with the B58 producing up to 382 horsepower and 369 lb-ft of torque, while the S58 produces up to 503 horsepower and 479 lb-ft of torque in the M3/M4 Competition models.
Which Engine is Better Between B58 and S58?
It’s difficult to say which engine is better between the B58 and S58 because they are designed for different purposes and have different performance characteristics.
The B58 engine is a versatile and reliable engine that is used in a wide range of BMW models, including the 3 Series, 4 Series, 5 Series, 7 Series, and X3.
It is capable of producing up to 382 horsepower and 369 lb-ft of torque, which is more than enough for most drivers. The B58 is known for its smooth and refined power delivery, as well as its good fuel efficiency.
On the other hand, the S58 engine is a high-performance engine that is used in the BMW M3 and M4 models. It is capable of producing up to 503 horsepower and 479 lb-ft of torque, making it one of the most powerful six-cylinder engines on the market.
The S58 is designed for driving enthusiasts who demand the highest levels of performance and handling. It features a more aggressive engine tune, larger turbochargers, and other modifications that allow it to deliver incredible acceleration and speed.
Overall, the choice between the B58 and S58 engines comes down to what the driver is looking for in a car.
If you’re looking for a reliable and efficient engine that can be used for everyday driving, the B58 is a great choice.
However, if you’re looking for a high-performance engine that can deliver blistering acceleration and speed, the S58 is the way to go.