What is the difference between n55b30 and n55b30a?
2 Answers
The main difference lies in the tuning. The inline 6-cylinder twin-scroll single turbo engine (coded as N55B30) has a horsepower of 306, while the N55B30A has a horsepower of 320. Additional information: N20B20: The N20B20 has three different power tuning levels. The high-power version has a maximum power of 180Kw (245ps) and a maximum torque of 350Nm. N20: The N20 engine can deliver maximum torque at as low as 1250 rpm, making it the production turbocharged engine with the lowest maximum torque output rpm setting currently available.
As an enthusiast of BMW engines, I often ponder these differences. Both the N55B30 and N55B30A are BMW's 3.0-liter turbocharged inline-six engines, but the latter, the N55B30A, is an upgraded version primarily optimized for emission regulations, such as meeting the Euro 5 standard, with possible minor adjustments to the compression ratio. In detail, the A version employs an improved turbocharger and electronic control unit software, enhancing response efficiency—though the peak power difference is minimal, around an extra 10 horsepower. During daily driving, you'll notice the A version runs smoother, especially in city stop-and-go traffic, with better fuel economy. Additionally, BMW introduced the A version to comply with stricter environmental regulations, reducing carbon emissions, which is an advantage for long-term use, though maintenance costs might be slightly higher due to the complexity of the new components. In short, checking the model suffix when buying a used BMW can help you avoid emission-related headaches.
