The BMW S52 engine is a naturally aspirated straight-six petrol engine that was produced by BMW from 1991 to 1999. It is the successor to the M20 engine and was used in a variety of BMW models, including the 3 Series, 5 Series, and Z3.
Key Features
- Straight-six cylinder configuration
- Double overhead camshaft (DOHC) design
- Four valves per cylinder
- Variable valve timing (VANOS) system
- 11:1 compression ratio
- Bore and stroke of 86.0 mm (3.4 in) and 91.0 mm (3.6 in), respectively
- Displacement of 2.8 liters (2,793 cc)
- Maximum power output of 193 kW (260 hp) at 5,500 rpm
- Maximum torque output of 320 N?m (236 ft?lb) at 3,900 rpm
Design and Construction
- The S52 engine is a compact and lightweight engine, thanks to its aluminum block and head.
- The engine features a double overhead camshaft (DOHC) design with four valves per cylinder.
- The intake and exhaust valves are operated by roller rockers, which reduce friction and improve valve timing accuracy.
- The S52 engine also features a variable valve timing (VANOS) system, which adjusts the timing of the intake valves to optimize engine performance at different engine speeds.
Performance and Efficiency
- The S52 engine is a powerful and efficient engine, producing 193 kW (260 hp) at 5,500 rpm and 320 N?m (236 ft?lb) of torque at 3,900 rpm.
- The engine also has a relatively high compression ratio of 11:1, which helps to improve fuel efficiency.
- The S52 engine is also known for its smooth and linear power delivery, making it a pleasure to drive.
Applications
- The S52 engine was used in a variety of BMW models, including:
- BMW 3 Series (E36)
- BMW 5 Series (E34, E39)
- BMW Z3
- Alpina B3
Conclusion
The BMW S52 engine is a well-engineered and powerful engine that offers a great balance of performance, efficiency, and reliability. It is a popular choice for BMW enthusiasts and is still used in many classic BMW models today.
Hey there! I'm Peter M. Thomas, the guy who's got your back when it comes to vehicle oils and fuels. I'm all about making the automotive world less confusing and more enjoyable for everyone. In my blog, I break down the nitty-gritty details of fuel, engine oil types, and throw in some handy reviews to make your life easier.
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