BMW has plonked in the M3/M4's S55 twin turbo in-line six. But it's been down tuned to offer a tad less power, unlike the extra 20 horses you get on the M4. Torque remains the same at 550 Nm.
from NDTV Auto - Latest https://ift.tt/2CaxqpO
Thursday, 13 December 2018
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