The 2013 F10 M5 with its 4.4L V8 S63Tu turbo engine has previously been shown to be underrated from the factory, which is BMW’s habit with its official quote power figures.
The latest results showing this come from iND who have just begun performance testing on their F10 M5. The result was 527 RWHP (rear wheel horsepower) on a totally stock F10 M5 running on pump gas and dyno’d on a dynojet. This represents just a 6% drivetrain loss.
The M5’s S63tu V8 runs a higher compression at 10.0:1 (@ 22 PSI), compared to the X5M/X6M S63 engine’s 9.3:1 (@ 17 PSI).
What most folks have not realized so far are the extensive modifications BMW has made to the F10 M5 engine. We point those out for you below, referencing BMW’s released info. Compared to the S85 engine of the E60 M5, BMW claims that “VALVETRONIC has also sharpened the responsiveness of this engine [S63Tü].
Here are the highlights of the new M5’s S63Tu engine and how it’s different from the S63 engine used for the X5 M and X6 M.
Two more innovations of the S63Tü:
- Innovative solenoid valve injectors in the new BMW M5 engine use multiple injections to achieve an extremely precise mixture preparation.
This is the biggest difference. As BMW puts it:
“Throughout each of its four previous generations, the heart of the BMW M5 has … CONTINUED