The pursuit of increased power and efficiency has led automotive manufacturers to explore increasingly complex forced induction systems. While twin-turbocharging is relatively common, the implementation of a quad-turbocharger setup is a far more exclusive and technologically advanced endeavor. This article delves into the specific BMW model that features this impressive engineering feat, exploring its design, performance, and the underlying rationale behind its implementation.
The model in question is the BMW M550d xDrive, specifically the generation produced between 2016 and 2020. This diesel-powered performance sedan leverages four turbochargers to deliver exceptional power and torque across a wide RPM range, making it a unique offering in BMW's lineup.
| Feature | Description | Significance |
|---|---|---|
| Engine Code | B57D30S0 | This is the specific designation for the 3.0-liter inline-six diesel engine that utilizes the quad-turbocharger system. It distinguishes it from other B57 engines with fewer turbos. |
| Turbocharger Configuration | Two high-pressure (HP) and two low-pressure (LP) turbochargers. One HP and one LP turbocharger work together for each bank of three cylinders. The HP turbos are smaller and react quickly to throttle inputs, while the LP turbos provide additional boost at higher RPMs. An exhaust flap system directs exhaust flow appropriately. | This configuration minimizes turbo lag and provides a broad, flat torque curve. The staged approach of using both HP and LP turbos ensures responsiveness at low RPMs and sustained power at higher RPMs. The exhaust flap system is crucial for managing exhaust flow and optimizing turbocharger performance. |
| Power Output | 400 hp (294 kW) @ 4,400 rpm | This high power output for a 3.0-liter diesel engine is a direct result of the quad-turbocharger system. It allows the M550d to achieve impressive acceleration and top speed. |
| Torque Output | 760 Nm (561 lb-ft) @ 2,000-3,000 rpm | The massive torque available from a low RPM is a key characteristic of this engine. It provides excellent responsiveness and effortless acceleration in everyday driving situations. |
| Vehicle Application | BMW M550d xDrive (G30/G31 5 Series), BMW 750d xDrive (G11/G12 7 Series), BMW X5 M50d (F15/G05), BMW X6 M50d (F16/G06), BMW X7 M50d (G07) | These are the specific models that were equipped with the B57D30S0 engine. The M550d was the first and perhaps most well-known application, but it was also used in other high-performance diesel models across BMW's range. |
| Emissions Standards | Euro 6 | Despite the high power output, the engine was designed to meet stringent Euro 6 emissions standards. This required advanced technologies such as particulate filters and NOx reduction systems. |
| Production Years | 2016-2020 (approximately) | The B57D30S0 engine was primarily produced during this period. Production ceased as BMW moved towards electrification and more advanced petrol engine technologies. |
| Fuel Consumption (Combined) | Varies depending on model and driving conditions, but typically around 5.9-6.6 liters per 100 km (40-48 mpg US) | Despite the high performance, the engine offered relatively good fuel economy due to its efficient diesel design and advanced turbocharging system. |
| 0-100 km/h (0-62 mph) | Around 4.4-4.7 seconds (depending on model) | This impressive acceleration time demonstrates the performance capabilities of the engine and the effectiveness of the xDrive all-wheel-drive system. |
Detailed Explanations
Engine Code: B57D30S0
The engine code, B57D30S0, is a specific identifier for the 3.0-liter inline-six diesel engine that is equipped with the quad-turbocharger system. This code is crucial for identifying the correct engine when ordering parts, performing maintenance, or researching technical specifications. It differentiates this particular version of the B57 engine from other variants that may have different turbocharger configurations or power outputs.
Turbocharger Configuration: Two High-Pressure (HP) and Two Low-Pressure (LP) Turbochargers
The quad-turbocharger system consists of two high-pressure (HP) and two low-pressure (LP) turbochargers. This configuration is designed to minimize turbo lag and provide a broad, flat torque curve. One HP and one LP turbocharger work together for each bank of three cylinders in the inline-six engine. The smaller HP turbos react quickly to throttle inputs, providing immediate boost at low RPMs. As the engine speed increases, the larger LP turbos come into play, providing additional boost and sustaining power at higher RPMs. An exhaust flap system intelligently manages exhaust flow, directing it to the appropriate turbochargers based on engine load and RPM. This sophisticated system ensures optimal turbocharger performance across the entire engine operating range.
Power Output: 400 hp (294 kW) @ 4,400 rpm
The B57D30S0 engine produces a maximum power output of 400 horsepower (294 kilowatts) at 4,400 rpm. This impressive power output for a 3.0-liter diesel engine is a direct result of the sophisticated quad-turbocharger system. The multiple turbochargers allow the engine to ingest a significantly larger volume of air, resulting in increased combustion efficiency and higher power generation. This high power output allows the BMW M550d xDrive and other vehicles equipped with this engine to achieve impressive acceleration and top speeds.
Torque Output: 760 Nm (561 lb-ft) @ 2,000-3,000 rpm
The engine boasts a massive torque output of 760 Newton-meters (561 lb-ft) available from a low 2,000 to 3,000 rpm. This is a key characteristic of this engine, providing excellent responsiveness and effortless acceleration in everyday driving situations. The quad-turbocharger system is instrumental in achieving this high torque output at such a low RPM. The rapid response of the high-pressure turbochargers ensures that torque is readily available from the moment the throttle is pressed, making the engine feel incredibly powerful and responsive.
Vehicle Application: BMW M550d xDrive (G30/G31 5 Series), BMW 750d xDrive (G11/G12 7 Series), BMW X5 M50d (F15/G05), BMW X6 M50d (F16/G06), BMW X7 M50d (G07)
The B57D30S0 engine was primarily used in the BMW M550d xDrive (G30/G31 5 Series). However, it was also found in other high-performance diesel models across BMW's range, including the 750d xDrive (G11/G12 7 Series), X5 M50d (F15/G05), X6 M50d (F16/G06), and X7 M50d (G07). These models were all designed to offer a blend of performance, luxury, and fuel efficiency, and the quad-turbocharged diesel engine was a key component in achieving this balance.
Emissions Standards: Euro 6
Despite its high power output, the B57D30S0 engine was designed to meet stringent Euro 6 emissions standards. This required the implementation of advanced technologies such as particulate filters and NOx reduction systems. The particulate filter traps soot particles from the exhaust, while the NOx reduction system uses a catalyst to convert harmful nitrogen oxides into less harmful nitrogen and water. These technologies ensure that the engine meets the required emissions standards without compromising performance.
Production Years: 2016-2020 (approximately)
The B57D30S0 engine was primarily produced during the years 2016 to 2020. This period saw BMW investing heavily in diesel technology, particularly for high-performance applications. However, as BMW shifted its focus towards electrification and more advanced petrol engine technologies, the production of the B57D30S0 engine ceased.
Fuel Consumption (Combined): Varies depending on model and driving conditions, but typically around 5.9-6.6 liters per 100 km (40-48 mpg US)
Despite the high performance, the B57D30S0 engine offered relatively good fuel economy due to its efficient diesel design and advanced turbocharging system. Fuel consumption varied depending on the specific model and driving conditions, but typically ranged from 5.9 to 6.6 liters per 100 km (40 to 48 mpg US). This fuel efficiency, combined with the engine's high power and torque output, made it an attractive option for drivers seeking a balance of performance and economy.
0-100 km/h (0-62 mph): Around 4.4-4.7 seconds (depending on model)
The impressive acceleration time of around 4.4 to 4.7 seconds from 0 to 100 km/h (0 to 62 mph) demonstrates the performance capabilities of the B57D30S0 engine and the effectiveness of the xDrive all-wheel-drive system. This rapid acceleration is a testament to the engine's high power and torque output, as well as the ability of the xDrive system to effectively distribute power to all four wheels for optimal traction.
Frequently Asked Questions
Which BMW has 4 turbos?
The BMW M550d xDrive (specifically the G30/G31 5 Series generation produced between 2016 and 2020) is the most well-known BMW model with a quad-turbo diesel engine. Other models included the 750d xDrive, X5 M50d, X6 M50d, and X7 M50d.
Why does the BMW M550d have 4 turbos?
The quad-turbo setup minimizes turbo lag and provides a broad torque curve, offering both responsiveness and sustained power. This configuration enhances performance and drivability.
What is the engine code for the quad-turbo diesel engine?
The engine code for the quad-turbo diesel engine is B57D30S0. This identifies the specific 3.0-liter inline-six diesel engine.
How much horsepower does the quad-turbo diesel engine produce?
The B57D30S0 engine produces 400 horsepower (294 kW). This high output is a result of the advanced turbocharging system.
Is the quad-turbo diesel engine still in production?
No, the B57D30S0 engine is no longer in production. BMW has shifted its focus towards electrification and advanced petrol engines.
Conclusion
The BMW M550d xDrive, along with other M Performance diesel models, represents a fascinating chapter in automotive engineering, showcasing the potential of quad-turbocharging to deliver exceptional performance and efficiency. While production of these engines has ceased, they remain a testament to BMW's innovative spirit and commitment to pushing the boundaries of internal combustion engine technology. If you are looking for a unique and powerful diesel performance car, the M550d or its siblings offer a compelling option on the used car market.