10/01/2018
The Heart of the Beast: Unpacking the Mercedes S63 AMG's Engine
When one speaks of the pinnacle of automotive luxury and performance, the Mercedes-Benz S-Class invariably comes to mind. However, for those who crave an even more exhilarating experience, the AMG variants represent the zenith. The Mercedes-Benz S63 AMG, in particular, has long been a benchmark for power, refinement, and technological prowess. At its core, the S63 AMG is defined by its formidable engine, a masterpiece of engineering that embodies the 'more performance, less consumption' ethos that AMG champions.
The AMG 5.5-Litre V8 Biturbo: A New Era of Power
The S63 AMG, as detailed in the provided information, benefits from a completely newly developed powertrain. This is not merely an upgrade; it's a paradigm shift. The heart of this machine is the AMG 5.5-litre V8 biturbo engine, internally designated as the M157. This powerhouse delivers a peak output of up to 420 kW (571 hp) and a staggering 900 Nm of torque when equipped with the AMG Performance package. This potent combination, paired with the AMG SPEEDSHIFT MCT 7-speed sports transmission, marks a significant step forward in reducing consumption and emissions while simultaneously elevating performance. Mercedes-AMG's commitment to its "AMG Performance 2015" drive strategy is evident here, promising a future where exhilarating performance goes hand-in-hand with environmental responsibility.
Ola Källenius, head of Mercedes-AMG GmbH, highlighted the groundbreaking nature of this engine, stating, "We are heading into a new era with the S63 AMG: for the first time we have combined spray-guided direct petrol injection with biturbocharging and the start/stop system." This integration of advanced technologies is key to achieving the impressive balance of power and efficiency.
Technological Innovations: The M157 Engine
The M157 engine is a showcase of AMG's engineering ingenuity. It features several key technological highlights:
- Spray-Guided Direct Petrol Injection: This system, utilising piezo-electric injectors, precisely sprays fuel into the combustion chambers. This leads to improved fuel economy due to higher thermodynamic efficiency and, consequently, lower exhaust emissions.
- Biturbocharging: Two turbochargers, strategically located next to the cylinder banks, force air into the eight cylinders, significantly boosting power output. The maximum charge pressure is 1.0 bar, increasing to 1.3 bar with the AMG Performance package.
- Air/Water Charge Air Cooling: An efficient air/water intercooler, housed within the V of the cylinder banks, cools the compressed intake air, ensuring a consistently low intake temperature even under full load, which is crucial for maintaining peak performance across all ambient temperatures.
- Controlled Efficiency Start/Stop Function: This standard feature, active in the "C" (Controlled Efficiency) drive mode, switches off the engine when the vehicle comes to a stop, further contributing to fuel savings.
- Generator Management: This system recovers kinetic energy during overrun or braking to charge the battery, reducing the load on the engine and improving fuel efficiency.
- Full Aluminium Crankcase: Employing lightweight construction methods, the diecast aluminium crankcase contributes to the engine's low dry weight of just 204 kg, promoting balanced weight distribution in the vehicle.
- Four-Valve Technology with Variable Camshaft Timing: This system optimises the charging of combustion chambers and ensures excellent output and torque across the rev range.
Compared to its predecessor, the AMG 6.3-litre naturally aspirated V8 engine (6208 cc), the new 5.5-litre biturbo unit (5461 cc) achieves its impressive figures with a smaller displacement, a testament to the advancements in engine technology.
Performance Figures: A Quantum Leap
The impact of these technological advancements is clearly reflected in the performance figures. The new S63 AMG boasts a fuel consumption of just 10.5 litres per 100 kilometres (NEDC combined). This represents a reduction of 3.9 litres per 100 km compared to the previous naturally aspirated V8 model, a saving of over 25 percent – a feat acknowledged by engine specialists as a "quantum leap." CO2 emissions are also significantly reduced, standing at 244 grams per kilometre, nearly 30 percent lower than the outgoing model.
In terms of acceleration, the S63 AMG is no slouch. It sprints from 0 to 100 km/h in a mere 4.5 seconds. Opting for the AMG Performance package shaves off a tenth of a second, achieving the same benchmark in 4.4 seconds, and also raises the electronically limited top speed from 250 km/h to 300 km/h.
AMG SPEEDSHIFT MCT 7-Speed Sports Transmission
Complementing the V8 biturbo engine is the exclusive AMG SPEEDSHIFT MCT 7-speed sports transmission. This transmission replaces the conventional torque converter with a wet start-up clutch, which not only enhances emotional appeal and driving dynamics but also contributes to fuel efficiency. Its "C" mode activates the start/stop function and ensures the car starts in second gear, with earlier upshifts to promote a more economical driving style. The transmission's ability to handle the engine's substantial torque, coupled with its rapid shift times and distinct driving modes, ensures a seamless and engaging power delivery.
A Legacy of V8 Power: AMG's Engine History
The 5.5-litre V8 biturbo engine is the latest chapter in a long and storied history of powerful V8 engines from AMG. Since its inception in 1967, AMG has consistently pushed the boundaries of performance:
| Engine Designation | Displacement | Key Features | Notable Output |
|---|---|---|---|
| 300 SEL 6.8 AMG (1971) | 6.8 litres | Enlarged displacement, racing modifications | 315 kW (428 hp) |
| M117 | 5.6 litres | First V8 with four-valve technology | 265 kW (360 hp) |
| M113 K (Supercharged) | 5.5 litres | Supercharged V8 | Up to 428 kW (582 hp) |
| M155 (SLR McLaren) | 5.5 litres | More powerful supercharged V8 | Up to 478 kW (650 hp) |
| M156 (Naturally Aspirated) | 6.3 litres | Naturally aspirated, high-revving V8 | Up to 386 kW (525 hp) |
| M157 (Biturbo) | 5.5 litres | Biturbo, direct injection, start/stop | Up to 420 kW (571 hp) |
The M157 engine builds upon this legacy, incorporating modern technologies to achieve unprecedented levels of efficiency and performance. Its success in reducing consumption by over 25% while increasing output is a significant achievement that sets a new standard in its class.
Beyond the Engine: A Harmonious Package
The S63 AMG is more than just its engine; it's a meticulously crafted vehicle where every component works in harmony. The AMG sports suspension, based on Active Body Control (ABC), provides exceptional handling and comfort, minimising body roll and compensating for crosswinds. The AMG high-performance braking system, featuring double floating brake calipers at the front, ensures immense stopping power and excellent fade resistance. Furthermore, the Direct-Steer system, with its variable ratio, enhances steering response and agility, making the car a joy to drive on winding roads.
Frequently Asked Questions
- What is the displacement of the S63 AMG engine?
- The S63 AMG is powered by a 5.5-litre (5461 cc) V8 biturbo engine.
- What is the power output of the S63 AMG engine?
- The standard engine produces 400 kW (544 hp), while the AMG Performance package increases this to 420 kW (571 hp).
- What is the torque figure for the S63 AMG?
- The engine delivers 800 Nm of torque as standard, and 900 Nm with the AMG Performance package.
- How does the fuel consumption compare to its predecessor?
- The new S63 AMG is over 25% more economical, with a combined NEDC figure of 10.5 litres per 100 kilometres, compared to its naturally aspirated predecessor.
- What transmission does the S63 AMG use?
- It is equipped with the AMG SPEEDSHIFT MCT 7-speed sports transmission.
In conclusion, the Mercedes-Benz S63 AMG, with its revolutionary 5.5-litre V8 biturbo engine, represents a significant leap forward in automotive engineering. It masterfully blends exhilarating performance with remarkable efficiency, all while upholding the luxurious comfort and sophisticated presence expected of an S-Class. This powertrain is not just an engine; it's a statement of AMG's dedication to pushing the boundaries of what's possible in high-performance motoring.
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