What is the difference between M5 and 550i?
What is the difference between M5 and 550i? Both engines are the same. But the M5 engine uses a higher compression ratio, 10:1 vs 9.3:1, as well as a higher boost, 1.5 bar vs 1.3 bar. It also has two twin-scroll turbos instead of the two normal turbos in the standard 550i, and they changed […]